cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame^] | 1 | /* |
| 2 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 3 | % % |
| 4 | % % |
| 5 | % % |
| 6 | % EEEEE FFFFF FFFFF EEEEE CCCC TTTTT % |
| 7 | % E F F E C T % |
| 8 | % EEE FFF FFF EEE C T % |
| 9 | % E F F E C T % |
| 10 | % EEEEE F F EEEEE CCCC T % |
| 11 | % % |
| 12 | % % |
| 13 | % MagickCore Image Effects Methods % |
| 14 | % % |
| 15 | % Software Design % |
| 16 | % John Cristy % |
| 17 | % October 1996 % |
| 18 | % % |
| 19 | % % |
| 20 | % Copyright 1999-2009 ImageMagick Studio LLC, a non-profit organization % |
| 21 | % dedicated to making software imaging solutions freely available. % |
| 22 | % % |
| 23 | % You may not use this file except in compliance with the License. You may % |
| 24 | % obtain a copy of the License at % |
| 25 | % % |
| 26 | % http://www.imagemagick.org/script/license.php % |
| 27 | % % |
| 28 | % Unless required by applicable law or agreed to in writing, software % |
| 29 | % distributed under the License is distributed on an "AS IS" BASIS, % |
| 30 | % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % |
| 31 | % See the License for the specific language governing permissions and % |
| 32 | % limitations under the License. % |
| 33 | % % |
| 34 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 35 | % |
| 36 | % |
| 37 | % |
| 38 | */ |
| 39 | |
| 40 | /* |
| 41 | Include declarations. |
| 42 | */ |
| 43 | #include "magick/studio.h" |
| 44 | #include "magick/property.h" |
| 45 | #include "magick/blob.h" |
| 46 | #include "magick/cache-view.h" |
| 47 | #include "magick/color.h" |
| 48 | #include "magick/color-private.h" |
| 49 | #include "magick/colorspace.h" |
| 50 | #include "magick/constitute.h" |
| 51 | #include "magick/decorate.h" |
| 52 | #include "magick/draw.h" |
| 53 | #include "magick/enhance.h" |
| 54 | #include "magick/exception.h" |
| 55 | #include "magick/exception-private.h" |
| 56 | #include "magick/effect.h" |
| 57 | #include "magick/fx.h" |
| 58 | #include "magick/gem.h" |
| 59 | #include "magick/geometry.h" |
| 60 | #include "magick/image-private.h" |
| 61 | #include "magick/list.h" |
| 62 | #include "magick/log.h" |
| 63 | #include "magick/memory_.h" |
| 64 | #include "magick/monitor.h" |
| 65 | #include "magick/monitor-private.h" |
| 66 | #include "magick/montage.h" |
| 67 | #include "magick/paint.h" |
| 68 | #include "magick/pixel-private.h" |
| 69 | #include "magick/property.h" |
| 70 | #include "magick/quantize.h" |
| 71 | #include "magick/quantum.h" |
| 72 | #include "magick/random_.h" |
| 73 | #include "magick/random-private.h" |
| 74 | #include "magick/resample.h" |
| 75 | #include "magick/resample-private.h" |
| 76 | #include "magick/resize.h" |
| 77 | #include "magick/resource_.h" |
| 78 | #include "magick/segment.h" |
| 79 | #include "magick/shear.h" |
| 80 | #include "magick/signature-private.h" |
| 81 | #include "magick/string_.h" |
| 82 | #include "magick/thread-private.h" |
| 83 | #include "magick/transform.h" |
| 84 | #include "magick/threshold.h" |
| 85 | |
| 86 | /* |
| 87 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 88 | % % |
| 89 | % % |
| 90 | % % |
| 91 | % A d a p t i v e B l u r I m a g e % |
| 92 | % % |
| 93 | % % |
| 94 | % % |
| 95 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 96 | % |
| 97 | % AdaptiveBlurImage() adaptively blurs the image by blurring less |
| 98 | % intensely near image edges and more intensely far from edges. We blur the |
| 99 | % image with a Gaussian operator of the given radius and standard deviation |
| 100 | % (sigma). For reasonable results, radius should be larger than sigma. Use a |
| 101 | % radius of 0 and AdaptiveBlurImage() selects a suitable radius for you. |
| 102 | % |
| 103 | % The format of the AdaptiveBlurImage method is: |
| 104 | % |
| 105 | % Image *AdaptiveBlurImage(const Image *image,const double radius, |
| 106 | % const double sigma,ExceptionInfo *exception) |
| 107 | % Image *AdaptiveBlurImageChannel(const Image *image, |
| 108 | % const ChannelType channel,double radius,const double sigma, |
| 109 | % ExceptionInfo *exception) |
| 110 | % |
| 111 | % A description of each parameter follows: |
| 112 | % |
| 113 | % o image: the image. |
| 114 | % |
| 115 | % o channel: the channel type. |
| 116 | % |
| 117 | % o radius: the radius of the Gaussian, in pixels, not counting the center |
| 118 | % pixel. |
| 119 | % |
| 120 | % o sigma: the standard deviation of the Laplacian, in pixels. |
| 121 | % |
| 122 | % o exception: return any errors or warnings in this structure. |
| 123 | % |
| 124 | */ |
| 125 | |
| 126 | MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius, |
| 127 | const double sigma,ExceptionInfo *exception) |
| 128 | { |
| 129 | Image |
| 130 | *blur_image; |
| 131 | |
| 132 | blur_image=AdaptiveBlurImageChannel(image,DefaultChannels,radius,sigma, |
| 133 | exception); |
| 134 | return(blur_image); |
| 135 | } |
| 136 | |
| 137 | MagickExport Image *AdaptiveBlurImageChannel(const Image *image, |
| 138 | const ChannelType channel,const double radius,const double sigma, |
| 139 | ExceptionInfo *exception) |
| 140 | { |
| 141 | #define AdaptiveBlurImageTag "Convolve/Image" |
| 142 | #define MagickSigma (fabs(sigma) <= MagickEpsilon ? 1.0 : sigma) |
| 143 | |
| 144 | double |
| 145 | **kernel; |
| 146 | |
| 147 | Image |
| 148 | *blur_image, |
| 149 | *edge_image, |
| 150 | *gaussian_image; |
| 151 | |
| 152 | long |
| 153 | j, |
| 154 | progress, |
| 155 | y; |
| 156 | |
| 157 | MagickBooleanType |
| 158 | status; |
| 159 | |
| 160 | MagickPixelPacket |
| 161 | zero; |
| 162 | |
| 163 | MagickRealType |
| 164 | alpha, |
| 165 | bias, |
| 166 | normalize; |
| 167 | |
| 168 | register long |
| 169 | i, |
| 170 | u, |
| 171 | v; |
| 172 | |
| 173 | unsigned long |
| 174 | width; |
| 175 | |
| 176 | CacheView |
| 177 | *blur_view, |
| 178 | *edge_view, |
| 179 | *image_view; |
| 180 | |
| 181 | assert(image != (const Image *) NULL); |
| 182 | assert(image->signature == MagickSignature); |
| 183 | if (image->debug != MagickFalse) |
| 184 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 185 | assert(exception != (ExceptionInfo *) NULL); |
| 186 | assert(exception->signature == MagickSignature); |
| 187 | blur_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception); |
| 188 | if (blur_image == (Image *) NULL) |
| 189 | return((Image *) NULL); |
| 190 | if (fabs(sigma) <= MagickEpsilon) |
| 191 | return(blur_image); |
| 192 | if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse) |
| 193 | { |
| 194 | InheritException(exception,&blur_image->exception); |
| 195 | blur_image=DestroyImage(blur_image); |
| 196 | return((Image *) NULL); |
| 197 | } |
| 198 | /* |
| 199 | Edge detect the image brighness channel, level, blur, and level again. |
| 200 | */ |
| 201 | edge_image=EdgeImage(image,radius,exception); |
| 202 | if (edge_image == (Image *) NULL) |
| 203 | { |
| 204 | blur_image=DestroyImage(blur_image); |
| 205 | return((Image *) NULL); |
| 206 | } |
| 207 | (void) LevelImage(edge_image,"20%,95%"); |
| 208 | gaussian_image=GaussianBlurImage(edge_image,radius,sigma,exception); |
| 209 | if (gaussian_image != (Image *) NULL) |
| 210 | { |
| 211 | edge_image=DestroyImage(edge_image); |
| 212 | edge_image=gaussian_image; |
| 213 | } |
| 214 | (void) LevelImage(edge_image,"10%,95%"); |
| 215 | /* |
| 216 | Create a set of kernels from maximum (radius,sigma) to minimum. |
| 217 | */ |
| 218 | width=GetOptimalKernelWidth2D(radius,sigma); |
| 219 | kernel=(double **) AcquireQuantumMemory((size_t) width,sizeof(*kernel)); |
| 220 | if (kernel == (double **) NULL) |
| 221 | { |
| 222 | edge_image=DestroyImage(edge_image); |
| 223 | blur_image=DestroyImage(blur_image); |
| 224 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 225 | } |
| 226 | (void) ResetMagickMemory(kernel,0,(size_t) width*sizeof(*kernel)); |
| 227 | for (i=0; i < (long) width; i+=2) |
| 228 | { |
| 229 | kernel[i]=(double *) AcquireQuantumMemory((size_t) (width-i),(width-i)* |
| 230 | sizeof(**kernel)); |
| 231 | if (kernel[i] == (double *) NULL) |
| 232 | break; |
| 233 | j=0; |
| 234 | for (v=(-((long) (width-i)/2)); v <= (long) ((width-i)/2); v++) |
| 235 | { |
| 236 | for (u=(-((long) (width-i)/2)); u <= (long) ((width-i)/2); u++) |
| 237 | { |
| 238 | alpha=exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma)); |
| 239 | kernel[i][j]=(double) (alpha/(2.0*MagickPI*MagickSigma*MagickSigma)); |
| 240 | j++; |
| 241 | } |
| 242 | } |
| 243 | normalize=0.0; |
| 244 | for (j=0; j < (long) ((width-i)*(width-i)); j++) |
| 245 | normalize+=kernel[i][j]; |
| 246 | if (fabs(normalize) <= MagickEpsilon) |
| 247 | normalize=1.0; |
| 248 | normalize=1.0/normalize; |
| 249 | for (j=0; j < (long) ((width-i)*(width-i)); j++) |
| 250 | kernel[i][j]=(double) (normalize*kernel[i][j]); |
| 251 | } |
| 252 | if (i < (long) width) |
| 253 | { |
| 254 | for (i-=2; i >= 0; i-=2) |
| 255 | kernel[i]=(double *) RelinquishMagickMemory(kernel[i]); |
| 256 | kernel=(double **) RelinquishMagickMemory(kernel); |
| 257 | edge_image=DestroyImage(edge_image); |
| 258 | blur_image=DestroyImage(blur_image); |
| 259 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 260 | } |
| 261 | /* |
| 262 | Adaptively blur image. |
| 263 | */ |
| 264 | status=MagickTrue; |
| 265 | progress=0; |
| 266 | bias=image->bias; |
| 267 | GetMagickPixelPacket(image,&zero); |
| 268 | image_view=AcquireCacheView(image); |
| 269 | edge_view=AcquireCacheView(edge_image); |
| 270 | blur_view=AcquireCacheView(blur_image); |
| 271 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 272 | #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| 273 | #endif |
| 274 | for (y=0; y < (long) blur_image->rows; y++) |
| 275 | { |
| 276 | register const IndexPacket |
| 277 | *__restrict indexes; |
| 278 | |
| 279 | register const PixelPacket |
| 280 | *__restrict p, |
| 281 | *__restrict r; |
| 282 | |
| 283 | register IndexPacket |
| 284 | *__restrict blur_indexes; |
| 285 | |
| 286 | register long |
| 287 | x; |
| 288 | |
| 289 | register PixelPacket |
| 290 | *__restrict q; |
| 291 | |
| 292 | if (status == MagickFalse) |
| 293 | continue; |
| 294 | r=GetCacheViewVirtualPixels(edge_view,0,y,edge_image->columns,1,exception); |
| 295 | q=QueueCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1, |
| 296 | exception); |
| 297 | if ((r == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL)) |
| 298 | { |
| 299 | status=MagickFalse; |
| 300 | continue; |
| 301 | } |
| 302 | blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view); |
| 303 | for (x=0; x < (long) blur_image->columns; x++) |
| 304 | { |
| 305 | MagickPixelPacket |
| 306 | pixel; |
| 307 | |
| 308 | MagickRealType |
| 309 | alpha, |
| 310 | gamma; |
| 311 | |
| 312 | register const double |
| 313 | *__restrict k; |
| 314 | |
| 315 | register long |
| 316 | i, |
| 317 | u, |
| 318 | v; |
| 319 | |
| 320 | gamma=0.0; |
| 321 | i=(long) (width*QuantumScale*PixelIntensity(r)+0.5); |
| 322 | if (i < 0) |
| 323 | i=0; |
| 324 | else |
| 325 | if (i > (long) width) |
| 326 | i=(long) width; |
| 327 | if ((i & 0x01) != 0) |
| 328 | i--; |
| 329 | p=GetCacheViewVirtualPixels(image_view,x-((long) (width-i)/2L),y-(long) |
| 330 | ((width-i)/2L),width-i,width-i,exception); |
| 331 | if (p == (const PixelPacket *) NULL) |
| 332 | break; |
| 333 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 334 | pixel=zero; |
| 335 | k=kernel[i]; |
| 336 | for (v=0; v < (long) (width-i); v++) |
| 337 | { |
| 338 | for (u=0; u < (long) (width-i); u++) |
| 339 | { |
| 340 | alpha=1.0; |
| 341 | if (((channel & OpacityChannel) != 0) && |
| 342 | (image->matte != MagickFalse)) |
| 343 | alpha=(MagickRealType) (QuantumScale*(QuantumRange-p->opacity)); |
| 344 | if ((channel & RedChannel) != 0) |
| 345 | pixel.red+=(*k)*alpha*p->red; |
| 346 | if ((channel & GreenChannel) != 0) |
| 347 | pixel.green+=(*k)*alpha*p->green; |
| 348 | if ((channel & BlueChannel) != 0) |
| 349 | pixel.blue+=(*k)*alpha*p->blue; |
| 350 | if ((channel & OpacityChannel) != 0) |
| 351 | pixel.opacity+=(*k)*p->opacity; |
| 352 | if (((channel & IndexChannel) != 0) && |
| 353 | (image->colorspace == CMYKColorspace)) |
| 354 | pixel.index+=(*k)*alpha*indexes[x+(width-i)*v+u]; |
| 355 | gamma+=(*k)*alpha; |
| 356 | k++; |
| 357 | p++; |
| 358 | } |
| 359 | } |
| 360 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma); |
| 361 | if ((channel & RedChannel) != 0) |
| 362 | q->red=RoundToQuantum(gamma*pixel.red+bias); |
| 363 | if ((channel & GreenChannel) != 0) |
| 364 | q->green=RoundToQuantum(gamma*pixel.green+bias); |
| 365 | if ((channel & BlueChannel) != 0) |
| 366 | q->blue=RoundToQuantum(gamma*pixel.blue+bias); |
| 367 | if ((channel & OpacityChannel) != 0) |
| 368 | q->opacity=RoundToQuantum(pixel.opacity+bias); |
| 369 | if (((channel & IndexChannel) != 0) && |
| 370 | (image->colorspace == CMYKColorspace)) |
| 371 | blur_indexes[x]=RoundToQuantum(gamma*pixel.index+bias); |
| 372 | q++; |
| 373 | r++; |
| 374 | } |
| 375 | if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse) |
| 376 | status=MagickFalse; |
| 377 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 378 | { |
| 379 | MagickBooleanType |
| 380 | proceed; |
| 381 | |
| 382 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 383 | #pragma omp critical (MagickCore_AdaptiveBlurImageChannel) |
| 384 | #endif |
| 385 | proceed=SetImageProgress(image,AdaptiveBlurImageTag,progress++, |
| 386 | image->rows); |
| 387 | if (proceed == MagickFalse) |
| 388 | status=MagickFalse; |
| 389 | } |
| 390 | } |
| 391 | blur_image->type=image->type; |
| 392 | blur_view=DestroyCacheView(blur_view); |
| 393 | edge_view=DestroyCacheView(edge_view); |
| 394 | image_view=DestroyCacheView(image_view); |
| 395 | edge_image=DestroyImage(edge_image); |
| 396 | for (i=0; i < (long) width; i+=2) |
| 397 | kernel[i]=(double *) RelinquishMagickMemory(kernel[i]); |
| 398 | kernel=(double **) RelinquishMagickMemory(kernel); |
| 399 | if (status == MagickFalse) |
| 400 | blur_image=DestroyImage(blur_image); |
| 401 | return(blur_image); |
| 402 | } |
| 403 | |
| 404 | /* |
| 405 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 406 | % % |
| 407 | % % |
| 408 | % % |
| 409 | % A d a p t i v e S h a r p e n I m a g e % |
| 410 | % % |
| 411 | % % |
| 412 | % % |
| 413 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 414 | % |
| 415 | % AdaptiveSharpenImage() adaptively sharpens the image by sharpening more |
| 416 | % intensely near image edges and less intensely far from edges. We sharpen the |
| 417 | % image with a Gaussian operator of the given radius and standard deviation |
| 418 | % (sigma). For reasonable results, radius should be larger than sigma. Use a |
| 419 | % radius of 0 and AdaptiveSharpenImage() selects a suitable radius for you. |
| 420 | % |
| 421 | % The format of the AdaptiveSharpenImage method is: |
| 422 | % |
| 423 | % Image *AdaptiveSharpenImage(const Image *image,const double radius, |
| 424 | % const double sigma,ExceptionInfo *exception) |
| 425 | % Image *AdaptiveSharpenImageChannel(const Image *image, |
| 426 | % const ChannelType channel,double radius,const double sigma, |
| 427 | % ExceptionInfo *exception) |
| 428 | % |
| 429 | % A description of each parameter follows: |
| 430 | % |
| 431 | % o image: the image. |
| 432 | % |
| 433 | % o channel: the channel type. |
| 434 | % |
| 435 | % o radius: the radius of the Gaussian, in pixels, not counting the center |
| 436 | % pixel. |
| 437 | % |
| 438 | % o sigma: the standard deviation of the Laplacian, in pixels. |
| 439 | % |
| 440 | % o exception: return any errors or warnings in this structure. |
| 441 | % |
| 442 | */ |
| 443 | |
| 444 | MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius, |
| 445 | const double sigma,ExceptionInfo *exception) |
| 446 | { |
| 447 | Image |
| 448 | *sharp_image; |
| 449 | |
| 450 | sharp_image=AdaptiveSharpenImageChannel(image,DefaultChannels,radius,sigma, |
| 451 | exception); |
| 452 | return(sharp_image); |
| 453 | } |
| 454 | |
| 455 | MagickExport Image *AdaptiveSharpenImageChannel(const Image *image, |
| 456 | const ChannelType channel,const double radius,const double sigma, |
| 457 | ExceptionInfo *exception) |
| 458 | { |
| 459 | #define AdaptiveSharpenImageTag "Convolve/Image" |
| 460 | #define MagickSigma (fabs(sigma) <= MagickEpsilon ? 1.0 : sigma) |
| 461 | |
| 462 | double |
| 463 | **kernel; |
| 464 | |
| 465 | Image |
| 466 | *sharp_image, |
| 467 | *edge_image, |
| 468 | *gaussian_image; |
| 469 | |
| 470 | long |
| 471 | j, |
| 472 | progress, |
| 473 | y; |
| 474 | |
| 475 | MagickBooleanType |
| 476 | status; |
| 477 | |
| 478 | MagickPixelPacket |
| 479 | zero; |
| 480 | |
| 481 | MagickRealType |
| 482 | alpha, |
| 483 | bias, |
| 484 | normalize; |
| 485 | |
| 486 | register long |
| 487 | i, |
| 488 | u, |
| 489 | v; |
| 490 | |
| 491 | unsigned long |
| 492 | width; |
| 493 | |
| 494 | CacheView |
| 495 | *sharp_view, |
| 496 | *edge_view, |
| 497 | *image_view; |
| 498 | |
| 499 | assert(image != (const Image *) NULL); |
| 500 | assert(image->signature == MagickSignature); |
| 501 | if (image->debug != MagickFalse) |
| 502 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 503 | assert(exception != (ExceptionInfo *) NULL); |
| 504 | assert(exception->signature == MagickSignature); |
| 505 | sharp_image=CloneImage(image,0,0,MagickTrue,exception); |
| 506 | if (sharp_image == (Image *) NULL) |
| 507 | return((Image *) NULL); |
| 508 | if (fabs(sigma) <= MagickEpsilon) |
| 509 | return(sharp_image); |
| 510 | if (SetImageStorageClass(sharp_image,DirectClass) == MagickFalse) |
| 511 | { |
| 512 | InheritException(exception,&sharp_image->exception); |
| 513 | sharp_image=DestroyImage(sharp_image); |
| 514 | return((Image *) NULL); |
| 515 | } |
| 516 | /* |
| 517 | Edge detect the image brighness channel, level, sharp, and level again. |
| 518 | */ |
| 519 | edge_image=EdgeImage(image,radius,exception); |
| 520 | if (edge_image == (Image *) NULL) |
| 521 | { |
| 522 | sharp_image=DestroyImage(sharp_image); |
| 523 | return((Image *) NULL); |
| 524 | } |
| 525 | (void) LevelImage(edge_image,"20%,95%"); |
| 526 | gaussian_image=GaussianBlurImage(edge_image,radius,sigma,exception); |
| 527 | if (gaussian_image != (Image *) NULL) |
| 528 | { |
| 529 | edge_image=DestroyImage(edge_image); |
| 530 | edge_image=gaussian_image; |
| 531 | } |
| 532 | (void) LevelImage(edge_image,"10%,95%"); |
| 533 | /* |
| 534 | Create a set of kernels from maximum (radius,sigma) to minimum. |
| 535 | */ |
| 536 | width=GetOptimalKernelWidth2D(radius,sigma); |
| 537 | kernel=(double **) AcquireQuantumMemory((size_t) width,sizeof(*kernel)); |
| 538 | if (kernel == (double **) NULL) |
| 539 | { |
| 540 | edge_image=DestroyImage(edge_image); |
| 541 | sharp_image=DestroyImage(sharp_image); |
| 542 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 543 | } |
| 544 | (void) ResetMagickMemory(kernel,0,(size_t) width*sizeof(*kernel)); |
| 545 | for (i=0; i < (long) width; i+=2) |
| 546 | { |
| 547 | kernel[i]=(double *) AcquireQuantumMemory((size_t) (width-i),(width-i)* |
| 548 | sizeof(**kernel)); |
| 549 | if (kernel[i] == (double *) NULL) |
| 550 | break; |
| 551 | j=0; |
| 552 | for (v=(-((long) (width-i)/2)); v <= (long) ((width-i)/2); v++) |
| 553 | { |
| 554 | for (u=(-((long) (width-i)/2)); u <= (long) ((width-i)/2); u++) |
| 555 | { |
| 556 | alpha=exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma)); |
| 557 | kernel[i][j]=(double) (-alpha/(2.0*MagickPI*MagickSigma*MagickSigma)); |
| 558 | j++; |
| 559 | } |
| 560 | } |
| 561 | normalize=0.0; |
| 562 | for (j=0; j < (long) ((width-i)*(width-i)); j++) |
| 563 | normalize+=kernel[i][j]; |
| 564 | if (fabs(normalize) <= MagickEpsilon) |
| 565 | normalize=1.0; |
| 566 | normalize=1.0/normalize; |
| 567 | for (j=0; j < (long) ((width-i)*(width-i)); j++) |
| 568 | kernel[i][j]=(double) (normalize*kernel[i][j]); |
| 569 | } |
| 570 | if (i < (long) width) |
| 571 | { |
| 572 | for (i-=2; i >= 0; i-=2) |
| 573 | kernel[i]=(double *) RelinquishMagickMemory(kernel[i]); |
| 574 | kernel=(double **) RelinquishMagickMemory(kernel); |
| 575 | edge_image=DestroyImage(edge_image); |
| 576 | sharp_image=DestroyImage(sharp_image); |
| 577 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 578 | } |
| 579 | /* |
| 580 | Adaptively sharpen image. |
| 581 | */ |
| 582 | status=MagickTrue; |
| 583 | progress=0; |
| 584 | bias=image->bias; |
| 585 | GetMagickPixelPacket(image,&zero); |
| 586 | image_view=AcquireCacheView(image); |
| 587 | edge_view=AcquireCacheView(edge_image); |
| 588 | sharp_view=AcquireCacheView(sharp_image); |
| 589 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 590 | #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| 591 | #endif |
| 592 | for (y=0; y < (long) sharp_image->rows; y++) |
| 593 | { |
| 594 | register const IndexPacket |
| 595 | *__restrict indexes; |
| 596 | |
| 597 | register const PixelPacket |
| 598 | *__restrict p, |
| 599 | *__restrict r; |
| 600 | |
| 601 | register IndexPacket |
| 602 | *__restrict sharp_indexes; |
| 603 | |
| 604 | register long |
| 605 | x; |
| 606 | |
| 607 | register PixelPacket |
| 608 | *__restrict q; |
| 609 | |
| 610 | if (status == MagickFalse) |
| 611 | continue; |
| 612 | r=GetCacheViewVirtualPixels(edge_view,0,y,edge_image->columns,1,exception); |
| 613 | q=QueueCacheViewAuthenticPixels(sharp_view,0,y,sharp_image->columns,1, |
| 614 | exception); |
| 615 | if ((r == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL)) |
| 616 | { |
| 617 | status=MagickFalse; |
| 618 | continue; |
| 619 | } |
| 620 | sharp_indexes=GetCacheViewAuthenticIndexQueue(sharp_view); |
| 621 | for (x=0; x < (long) sharp_image->columns; x++) |
| 622 | { |
| 623 | MagickPixelPacket |
| 624 | pixel; |
| 625 | |
| 626 | MagickRealType |
| 627 | alpha, |
| 628 | gamma; |
| 629 | |
| 630 | register const double |
| 631 | *__restrict k; |
| 632 | |
| 633 | register long |
| 634 | i, |
| 635 | u, |
| 636 | v; |
| 637 | |
| 638 | gamma=0.0; |
| 639 | i=(long) (width*(QuantumRange-QuantumScale*PixelIntensity(r))+0.5); |
| 640 | if (i < 0) |
| 641 | i=0; |
| 642 | else |
| 643 | if (i > (long) width) |
| 644 | i=(long) width; |
| 645 | if ((i & 0x01) != 0) |
| 646 | i--; |
| 647 | p=GetCacheViewVirtualPixels(image_view,x-((long) (width-i)/2L),y-(long) |
| 648 | ((width-i)/2L),width-i,width-i,exception); |
| 649 | if (p == (const PixelPacket *) NULL) |
| 650 | break; |
| 651 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 652 | k=kernel[i]; |
| 653 | pixel=zero; |
| 654 | for (v=0; v < (long) (width-i); v++) |
| 655 | { |
| 656 | for (u=0; u < (long) (width-i); u++) |
| 657 | { |
| 658 | alpha=1.0; |
| 659 | if (((channel & OpacityChannel) != 0) && |
| 660 | (image->matte != MagickFalse)) |
| 661 | alpha=(MagickRealType) (QuantumScale*(QuantumRange-p->opacity)); |
| 662 | if ((channel & RedChannel) != 0) |
| 663 | pixel.red+=(*k)*alpha*p->red; |
| 664 | if ((channel & GreenChannel) != 0) |
| 665 | pixel.green+=(*k)*alpha*p->green; |
| 666 | if ((channel & BlueChannel) != 0) |
| 667 | pixel.blue+=(*k)*alpha*p->blue; |
| 668 | if ((channel & OpacityChannel) != 0) |
| 669 | pixel.opacity+=(*k)*p->opacity; |
| 670 | if (((channel & IndexChannel) != 0) && |
| 671 | (image->colorspace == CMYKColorspace)) |
| 672 | pixel.index+=(*k)*alpha*indexes[x+(width-i)*v+u]; |
| 673 | gamma+=(*k)*alpha; |
| 674 | k++; |
| 675 | p++; |
| 676 | } |
| 677 | } |
| 678 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma); |
| 679 | if ((channel & RedChannel) != 0) |
| 680 | q->red=RoundToQuantum(gamma*pixel.red+bias); |
| 681 | if ((channel & GreenChannel) != 0) |
| 682 | q->green=RoundToQuantum(gamma*pixel.green+bias); |
| 683 | if ((channel & BlueChannel) != 0) |
| 684 | q->blue=RoundToQuantum(gamma*pixel.blue+bias); |
| 685 | if ((channel & OpacityChannel) != 0) |
| 686 | q->opacity=RoundToQuantum(pixel.opacity+bias); |
| 687 | if (((channel & IndexChannel) != 0) && |
| 688 | (image->colorspace == CMYKColorspace)) |
| 689 | sharp_indexes[x]=RoundToQuantum(gamma*pixel.index+bias); |
| 690 | q++; |
| 691 | r++; |
| 692 | } |
| 693 | if (SyncCacheViewAuthenticPixels(sharp_view,exception) == MagickFalse) |
| 694 | status=MagickFalse; |
| 695 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 696 | { |
| 697 | MagickBooleanType |
| 698 | proceed; |
| 699 | |
| 700 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 701 | #pragma omp critical (MagickCore_AdaptiveSharpenImageChannel) |
| 702 | #endif |
| 703 | proceed=SetImageProgress(image,AdaptiveSharpenImageTag,progress++, |
| 704 | image->rows); |
| 705 | if (proceed == MagickFalse) |
| 706 | status=MagickFalse; |
| 707 | } |
| 708 | } |
| 709 | sharp_image->type=image->type; |
| 710 | sharp_view=DestroyCacheView(sharp_view); |
| 711 | edge_view=DestroyCacheView(edge_view); |
| 712 | image_view=DestroyCacheView(image_view); |
| 713 | edge_image=DestroyImage(edge_image); |
| 714 | for (i=0; i < (long) width; i+=2) |
| 715 | kernel[i]=(double *) RelinquishMagickMemory(kernel[i]); |
| 716 | kernel=(double **) RelinquishMagickMemory(kernel); |
| 717 | if (status == MagickFalse) |
| 718 | sharp_image=DestroyImage(sharp_image); |
| 719 | return(sharp_image); |
| 720 | } |
| 721 | |
| 722 | /* |
| 723 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 724 | % % |
| 725 | % % |
| 726 | % % |
| 727 | % B l u r I m a g e % |
| 728 | % % |
| 729 | % % |
| 730 | % % |
| 731 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 732 | % |
| 733 | % BlurImage() blurs an image. We convolve the image with a Gaussian operator |
| 734 | % of the given radius and standard deviation (sigma). For reasonable results, |
| 735 | % the radius should be larger than sigma. Use a radius of 0 and BlurImage() |
| 736 | % selects a suitable radius for you. |
| 737 | % |
| 738 | % BlurImage() differs from GaussianBlurImage() in that it uses a separable |
| 739 | % kernel which is faster but mathematically equivalent to the non-separable |
| 740 | % kernel. |
| 741 | % |
| 742 | % The format of the BlurImage method is: |
| 743 | % |
| 744 | % Image *BlurImage(const Image *image,const double radius, |
| 745 | % const double sigma,ExceptionInfo *exception) |
| 746 | % Image *BlurImageChannel(const Image *image,const ChannelType channel, |
| 747 | % const double radius,const double sigma,ExceptionInfo *exception) |
| 748 | % |
| 749 | % A description of each parameter follows: |
| 750 | % |
| 751 | % o image: the image. |
| 752 | % |
| 753 | % o channel: the channel type. |
| 754 | % |
| 755 | % o radius: the radius of the Gaussian, in pixels, not counting the center |
| 756 | % pixel. |
| 757 | % |
| 758 | % o sigma: the standard deviation of the Gaussian, in pixels. |
| 759 | % |
| 760 | % o exception: return any errors or warnings in this structure. |
| 761 | % |
| 762 | */ |
| 763 | |
| 764 | MagickExport Image *BlurImage(const Image *image,const double radius, |
| 765 | const double sigma,ExceptionInfo *exception) |
| 766 | { |
| 767 | Image |
| 768 | *blur_image; |
| 769 | |
| 770 | blur_image=BlurImageChannel(image,DefaultChannels,radius,sigma,exception); |
| 771 | return(blur_image); |
| 772 | } |
| 773 | |
| 774 | static double *GetBlurKernel(unsigned long width,const MagickRealType sigma) |
| 775 | { |
| 776 | #define KernelRank 3 |
| 777 | |
| 778 | double |
| 779 | *kernel; |
| 780 | |
| 781 | long |
| 782 | bias; |
| 783 | |
| 784 | MagickRealType |
| 785 | alpha, |
| 786 | normalize; |
| 787 | |
| 788 | register long |
| 789 | i; |
| 790 | |
| 791 | /* |
| 792 | Generate a 1-D convolution kernel. |
| 793 | */ |
| 794 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"..."); |
| 795 | kernel=(double *) AcquireQuantumMemory((size_t) width,sizeof(*kernel)); |
| 796 | if (kernel == (double *) NULL) |
| 797 | return(0); |
| 798 | (void) ResetMagickMemory(kernel,0,(size_t) width*sizeof(*kernel)); |
| 799 | bias=KernelRank*(long) width/2; |
| 800 | for (i=(-bias); i <= bias; i++) |
| 801 | { |
| 802 | alpha=exp((-((double) (i*i))/(double) (2.0*KernelRank*KernelRank* |
| 803 | MagickSigma*MagickSigma))); |
| 804 | kernel[(i+bias)/KernelRank]+=(double) (alpha/(MagickSQ2PI*sigma)); |
| 805 | } |
| 806 | normalize=0.0; |
| 807 | for (i=0; i < (long) width; i++) |
| 808 | normalize+=kernel[i]; |
| 809 | for (i=0; i < (long) width; i++) |
| 810 | kernel[i]/=normalize; |
| 811 | return(kernel); |
| 812 | } |
| 813 | |
| 814 | MagickExport Image *BlurImageChannel(const Image *image, |
| 815 | const ChannelType channel,const double radius,const double sigma, |
| 816 | ExceptionInfo *exception) |
| 817 | { |
| 818 | #define BlurImageTag "Blur/Image" |
| 819 | |
| 820 | double |
| 821 | *kernel; |
| 822 | |
| 823 | Image |
| 824 | *blur_image; |
| 825 | |
| 826 | long |
| 827 | progress, |
| 828 | x, |
| 829 | y; |
| 830 | |
| 831 | MagickBooleanType |
| 832 | status; |
| 833 | |
| 834 | MagickPixelPacket |
| 835 | zero; |
| 836 | |
| 837 | MagickRealType |
| 838 | bias; |
| 839 | |
| 840 | register long |
| 841 | i; |
| 842 | |
| 843 | unsigned long |
| 844 | width; |
| 845 | |
| 846 | CacheView |
| 847 | *blur_view, |
| 848 | *image_view; |
| 849 | |
| 850 | /* |
| 851 | Initialize blur image attributes. |
| 852 | */ |
| 853 | assert(image != (Image *) NULL); |
| 854 | assert(image->signature == MagickSignature); |
| 855 | if (image->debug != MagickFalse) |
| 856 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 857 | assert(exception != (ExceptionInfo *) NULL); |
| 858 | assert(exception->signature == MagickSignature); |
| 859 | blur_image=CloneImage(image,0,0,MagickTrue,exception); |
| 860 | if (blur_image == (Image *) NULL) |
| 861 | return((Image *) NULL); |
| 862 | if (fabs(sigma) <= MagickEpsilon) |
| 863 | return(blur_image); |
| 864 | if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse) |
| 865 | { |
| 866 | InheritException(exception,&blur_image->exception); |
| 867 | blur_image=DestroyImage(blur_image); |
| 868 | return((Image *) NULL); |
| 869 | } |
| 870 | width=GetOptimalKernelWidth1D(radius,sigma); |
| 871 | kernel=GetBlurKernel(width,sigma); |
| 872 | if (kernel == (double *) NULL) |
| 873 | { |
| 874 | blur_image=DestroyImage(blur_image); |
| 875 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 876 | } |
| 877 | if (image->debug != MagickFalse) |
| 878 | { |
| 879 | char |
| 880 | format[MaxTextExtent], |
| 881 | *message; |
| 882 | |
| 883 | register const double |
| 884 | *k; |
| 885 | |
| 886 | (void) LogMagickEvent(TransformEvent,GetMagickModule(), |
| 887 | " BlurImage with %ld kernel:",width); |
| 888 | message=AcquireString(""); |
| 889 | k=kernel; |
| 890 | for (i=0; i < (long) width; i++) |
| 891 | { |
| 892 | *message='\0'; |
| 893 | (void) FormatMagickString(format,MaxTextExtent,"%ld: ",i); |
| 894 | (void) ConcatenateString(&message,format); |
| 895 | (void) FormatMagickString(format,MaxTextExtent,"%g ",*k++); |
| 896 | (void) ConcatenateString(&message,format); |
| 897 | (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message); |
| 898 | } |
| 899 | message=DestroyString(message); |
| 900 | } |
| 901 | /* |
| 902 | Blur rows. |
| 903 | */ |
| 904 | status=MagickTrue; |
| 905 | progress=0; |
| 906 | GetMagickPixelPacket(image,&zero); |
| 907 | bias=image->bias; |
| 908 | image_view=AcquireCacheView(image); |
| 909 | blur_view=AcquireCacheView(blur_image); |
| 910 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 911 | #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| 912 | #endif |
| 913 | for (y=0; y < (long) blur_image->rows; y++) |
| 914 | { |
| 915 | register const IndexPacket |
| 916 | *__restrict indexes; |
| 917 | |
| 918 | register const PixelPacket |
| 919 | *__restrict p; |
| 920 | |
| 921 | register IndexPacket |
| 922 | *__restrict blur_indexes; |
| 923 | |
| 924 | register long |
| 925 | x; |
| 926 | |
| 927 | register PixelPacket |
| 928 | *__restrict q; |
| 929 | |
| 930 | if (status == MagickFalse) |
| 931 | continue; |
| 932 | p=GetCacheViewVirtualPixels(image_view,-((long) width/2L),y,image->columns+ |
| 933 | width,1,exception); |
| 934 | q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1, |
| 935 | exception); |
| 936 | if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL)) |
| 937 | { |
| 938 | status=MagickFalse; |
| 939 | continue; |
| 940 | } |
| 941 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 942 | blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view); |
| 943 | for (x=0; x < (long) blur_image->columns; x++) |
| 944 | { |
| 945 | MagickPixelPacket |
| 946 | pixel; |
| 947 | |
| 948 | register const double |
| 949 | *__restrict k; |
| 950 | |
| 951 | register const PixelPacket |
| 952 | *__restrict kernel_pixels; |
| 953 | |
| 954 | register long |
| 955 | i; |
| 956 | |
| 957 | pixel=zero; |
| 958 | k=kernel; |
| 959 | kernel_pixels=p; |
| 960 | if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse)) |
| 961 | { |
| 962 | for (i=0; i < (long) width; i++) |
| 963 | { |
| 964 | pixel.red+=(*k)*kernel_pixels->red; |
| 965 | pixel.green+=(*k)*kernel_pixels->green; |
| 966 | pixel.blue+=(*k)*kernel_pixels->blue; |
| 967 | k++; |
| 968 | kernel_pixels++; |
| 969 | } |
| 970 | if ((channel & RedChannel) != 0) |
| 971 | q->red=RoundToQuantum(pixel.red+bias); |
| 972 | if ((channel & GreenChannel) != 0) |
| 973 | q->green=RoundToQuantum(pixel.green+bias); |
| 974 | if ((channel & BlueChannel) != 0) |
| 975 | q->blue=RoundToQuantum(pixel.blue+bias); |
| 976 | if ((channel & OpacityChannel) != 0) |
| 977 | { |
| 978 | k=kernel; |
| 979 | kernel_pixels=p; |
| 980 | for (i=0; i < (long) width; i++) |
| 981 | { |
| 982 | pixel.opacity+=(*k)*kernel_pixels->opacity; |
| 983 | k++; |
| 984 | kernel_pixels++; |
| 985 | } |
| 986 | q->opacity=RoundToQuantum(pixel.opacity+bias); |
| 987 | } |
| 988 | if (((channel & IndexChannel) != 0) && |
| 989 | (image->colorspace == CMYKColorspace)) |
| 990 | { |
| 991 | register const IndexPacket |
| 992 | *__restrict kernel_indexes; |
| 993 | |
| 994 | k=kernel; |
| 995 | kernel_indexes=indexes; |
| 996 | for (i=0; i < (long) width; i++) |
| 997 | { |
| 998 | pixel.index+=(*k)*(*kernel_indexes); |
| 999 | k++; |
| 1000 | kernel_indexes++; |
| 1001 | } |
| 1002 | blur_indexes[x]=RoundToQuantum(pixel.index+bias); |
| 1003 | } |
| 1004 | } |
| 1005 | else |
| 1006 | { |
| 1007 | MagickRealType |
| 1008 | alpha, |
| 1009 | gamma; |
| 1010 | |
| 1011 | gamma=0.0; |
| 1012 | for (i=0; i < (long) width; i++) |
| 1013 | { |
| 1014 | alpha=(MagickRealType) (QuantumScale*(QuantumRange- |
| 1015 | kernel_pixels->opacity)); |
| 1016 | pixel.red+=(*k)*alpha*kernel_pixels->red; |
| 1017 | pixel.green+=(*k)*alpha*kernel_pixels->green; |
| 1018 | pixel.blue+=(*k)*alpha*kernel_pixels->blue; |
| 1019 | gamma+=(*k)*alpha; |
| 1020 | k++; |
| 1021 | kernel_pixels++; |
| 1022 | } |
| 1023 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma); |
| 1024 | if ((channel & RedChannel) != 0) |
| 1025 | q->red=RoundToQuantum(gamma*pixel.red+bias); |
| 1026 | if ((channel & GreenChannel) != 0) |
| 1027 | q->green=RoundToQuantum(gamma*pixel.green+bias); |
| 1028 | if ((channel & BlueChannel) != 0) |
| 1029 | q->blue=RoundToQuantum(gamma*pixel.blue+bias); |
| 1030 | if ((channel & OpacityChannel) != 0) |
| 1031 | { |
| 1032 | k=kernel; |
| 1033 | kernel_pixels=p; |
| 1034 | for (i=0; i < (long) width; i++) |
| 1035 | { |
| 1036 | pixel.opacity+=(*k)*kernel_pixels->opacity; |
| 1037 | k++; |
| 1038 | kernel_pixels++; |
| 1039 | } |
| 1040 | q->opacity=RoundToQuantum(pixel.opacity+bias); |
| 1041 | } |
| 1042 | if (((channel & IndexChannel) != 0) && |
| 1043 | (image->colorspace == CMYKColorspace)) |
| 1044 | { |
| 1045 | register const IndexPacket |
| 1046 | *__restrict kernel_indexes; |
| 1047 | |
| 1048 | k=kernel; |
| 1049 | kernel_pixels=p; |
| 1050 | kernel_indexes=indexes; |
| 1051 | for (i=0; i < (long) width; i++) |
| 1052 | { |
| 1053 | alpha=(MagickRealType) (QuantumScale*(QuantumRange- |
| 1054 | kernel_pixels->opacity)); |
| 1055 | pixel.index+=(*k)*alpha*(*kernel_indexes); |
| 1056 | k++; |
| 1057 | kernel_pixels++; |
| 1058 | kernel_indexes++; |
| 1059 | } |
| 1060 | blur_indexes[x]=RoundToQuantum(gamma*pixel.index+bias); |
| 1061 | } |
| 1062 | } |
| 1063 | p++; |
| 1064 | q++; |
| 1065 | } |
| 1066 | if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse) |
| 1067 | status=MagickFalse; |
| 1068 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 1069 | { |
| 1070 | MagickBooleanType |
| 1071 | proceed; |
| 1072 | |
| 1073 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 1074 | #pragma omp critical (MagickCore_BlurImageChannel) |
| 1075 | #endif |
| 1076 | proceed=SetImageProgress(image,BlurImageTag,progress++,blur_image->rows+ |
| 1077 | blur_image->columns); |
| 1078 | if (proceed == MagickFalse) |
| 1079 | status=MagickFalse; |
| 1080 | } |
| 1081 | } |
| 1082 | blur_view=DestroyCacheView(blur_view); |
| 1083 | image_view=DestroyCacheView(image_view); |
| 1084 | /* |
| 1085 | Blur columns. |
| 1086 | */ |
| 1087 | image_view=AcquireCacheView(blur_image); |
| 1088 | blur_view=AcquireCacheView(blur_image); |
| 1089 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 1090 | #pragma omp parallel for shared(progress,status) |
| 1091 | #endif |
| 1092 | for (x=0; x < (long) blur_image->columns; x++) |
| 1093 | { |
| 1094 | register const IndexPacket |
| 1095 | *__restrict indexes; |
| 1096 | |
| 1097 | register const PixelPacket |
| 1098 | *__restrict p; |
| 1099 | |
| 1100 | register IndexPacket |
| 1101 | *__restrict blur_indexes; |
| 1102 | |
| 1103 | register long |
| 1104 | y; |
| 1105 | |
| 1106 | register PixelPacket |
| 1107 | *__restrict q; |
| 1108 | |
| 1109 | if (status == MagickFalse) |
| 1110 | continue; |
| 1111 | p=GetCacheViewVirtualPixels(image_view,x,-((long) width/2L),1,image->rows+ |
| 1112 | width,exception); |
| 1113 | q=GetCacheViewAuthenticPixels(blur_view,x,0,1,blur_image->rows,exception); |
| 1114 | if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL)) |
| 1115 | { |
| 1116 | status=MagickFalse; |
| 1117 | continue; |
| 1118 | } |
| 1119 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 1120 | blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view); |
| 1121 | for (y=0; y < (long) blur_image->rows; y++) |
| 1122 | { |
| 1123 | MagickPixelPacket |
| 1124 | pixel; |
| 1125 | |
| 1126 | register const double |
| 1127 | *__restrict k; |
| 1128 | |
| 1129 | register const PixelPacket |
| 1130 | *__restrict kernel_pixels; |
| 1131 | |
| 1132 | register long |
| 1133 | i; |
| 1134 | |
| 1135 | pixel=zero; |
| 1136 | k=kernel; |
| 1137 | kernel_pixels=p; |
| 1138 | if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse)) |
| 1139 | { |
| 1140 | for (i=0; i < (long) width; i++) |
| 1141 | { |
| 1142 | pixel.red+=(*k)*kernel_pixels->red; |
| 1143 | pixel.green+=(*k)*kernel_pixels->green; |
| 1144 | pixel.blue+=(*k)*kernel_pixels->blue; |
| 1145 | k++; |
| 1146 | kernel_pixels++; |
| 1147 | } |
| 1148 | if ((channel & RedChannel) != 0) |
| 1149 | q->red=RoundToQuantum(pixel.red+bias); |
| 1150 | if ((channel & GreenChannel) != 0) |
| 1151 | q->green=RoundToQuantum(pixel.green+bias); |
| 1152 | if ((channel & BlueChannel) != 0) |
| 1153 | q->blue=RoundToQuantum(pixel.blue+bias); |
| 1154 | if ((channel & OpacityChannel) != 0) |
| 1155 | { |
| 1156 | k=kernel; |
| 1157 | kernel_pixels=p; |
| 1158 | for (i=0; i < (long) width; i++) |
| 1159 | { |
| 1160 | pixel.opacity+=(*k)*kernel_pixels->opacity; |
| 1161 | k++; |
| 1162 | kernel_pixels++; |
| 1163 | } |
| 1164 | q->opacity=RoundToQuantum(pixel.opacity+bias); |
| 1165 | } |
| 1166 | if (((channel & IndexChannel) != 0) && |
| 1167 | (image->colorspace == CMYKColorspace)) |
| 1168 | { |
| 1169 | register const IndexPacket |
| 1170 | *__restrict kernel_indexes; |
| 1171 | |
| 1172 | k=kernel; |
| 1173 | kernel_indexes=indexes; |
| 1174 | for (i=0; i < (long) width; i++) |
| 1175 | { |
| 1176 | pixel.index+=(*k)*(*kernel_indexes); |
| 1177 | k++; |
| 1178 | kernel_indexes++; |
| 1179 | } |
| 1180 | blur_indexes[y]=RoundToQuantum(pixel.index+bias); |
| 1181 | } |
| 1182 | } |
| 1183 | else |
| 1184 | { |
| 1185 | MagickRealType |
| 1186 | alpha, |
| 1187 | gamma; |
| 1188 | |
| 1189 | gamma=0.0; |
| 1190 | for (i=0; i < (long) width; i++) |
| 1191 | { |
| 1192 | alpha=(MagickRealType) (QuantumScale*(QuantumRange- |
| 1193 | kernel_pixels->opacity)); |
| 1194 | pixel.red+=(*k)*alpha*kernel_pixels->red; |
| 1195 | pixel.green+=(*k)*alpha*kernel_pixels->green; |
| 1196 | pixel.blue+=(*k)*alpha*kernel_pixels->blue; |
| 1197 | gamma+=(*k)*alpha; |
| 1198 | k++; |
| 1199 | kernel_pixels++; |
| 1200 | } |
| 1201 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma); |
| 1202 | if ((channel & RedChannel) != 0) |
| 1203 | q->red=RoundToQuantum(gamma*pixel.red+bias); |
| 1204 | if ((channel & GreenChannel) != 0) |
| 1205 | q->green=RoundToQuantum(gamma*pixel.green+bias); |
| 1206 | if ((channel & BlueChannel) != 0) |
| 1207 | q->blue=RoundToQuantum(gamma*pixel.blue+bias); |
| 1208 | if ((channel & OpacityChannel) != 0) |
| 1209 | { |
| 1210 | k=kernel; |
| 1211 | kernel_pixels=p; |
| 1212 | for (i=0; i < (long) width; i++) |
| 1213 | { |
| 1214 | pixel.opacity+=(*k)*kernel_pixels->opacity; |
| 1215 | k++; |
| 1216 | kernel_pixels++; |
| 1217 | } |
| 1218 | q->opacity=RoundToQuantum(pixel.opacity+bias); |
| 1219 | } |
| 1220 | if (((channel & IndexChannel) != 0) && |
| 1221 | (image->colorspace == CMYKColorspace)) |
| 1222 | { |
| 1223 | register const IndexPacket |
| 1224 | *__restrict kernel_indexes; |
| 1225 | |
| 1226 | k=kernel; |
| 1227 | kernel_pixels=p; |
| 1228 | kernel_indexes=indexes; |
| 1229 | for (i=0; i < (long) width; i++) |
| 1230 | { |
| 1231 | alpha=(MagickRealType) (QuantumScale*(QuantumRange- |
| 1232 | kernel_pixels->opacity)); |
| 1233 | pixel.index+=(*k)*alpha*(*kernel_indexes); |
| 1234 | k++; |
| 1235 | kernel_pixels++; |
| 1236 | kernel_indexes++; |
| 1237 | } |
| 1238 | blur_indexes[y]=RoundToQuantum(gamma*pixel.index+bias); |
| 1239 | } |
| 1240 | } |
| 1241 | p++; |
| 1242 | q++; |
| 1243 | } |
| 1244 | if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse) |
| 1245 | status=MagickFalse; |
| 1246 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 1247 | { |
| 1248 | MagickBooleanType |
| 1249 | proceed; |
| 1250 | |
| 1251 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 1252 | #pragma omp critical (MagickCore_BlurImageChannel) |
| 1253 | #endif |
| 1254 | proceed=SetImageProgress(image,BlurImageTag,progress++,blur_image->rows+ |
| 1255 | blur_image->columns); |
| 1256 | if (proceed == MagickFalse) |
| 1257 | status=MagickFalse; |
| 1258 | } |
| 1259 | } |
| 1260 | blur_view=DestroyCacheView(blur_view); |
| 1261 | image_view=DestroyCacheView(image_view); |
| 1262 | kernel=(double *) RelinquishMagickMemory(kernel); |
| 1263 | if (status == MagickFalse) |
| 1264 | blur_image=DestroyImage(blur_image); |
| 1265 | blur_image->type=image->type; |
| 1266 | return(blur_image); |
| 1267 | } |
| 1268 | |
| 1269 | /* |
| 1270 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1271 | % % |
| 1272 | % % |
| 1273 | % % |
| 1274 | % D e s p e c k l e I m a g e % |
| 1275 | % % |
| 1276 | % % |
| 1277 | % % |
| 1278 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1279 | % |
| 1280 | % DespeckleImage() reduces the speckle noise in an image while perserving the |
| 1281 | % edges of the original image. |
| 1282 | % |
| 1283 | % The format of the DespeckleImage method is: |
| 1284 | % |
| 1285 | % Image *DespeckleImage(const Image *image,ExceptionInfo *exception) |
| 1286 | % |
| 1287 | % A description of each parameter follows: |
| 1288 | % |
| 1289 | % o image: the image. |
| 1290 | % |
| 1291 | % o exception: return any errors or warnings in this structure. |
| 1292 | % |
| 1293 | */ |
| 1294 | |
| 1295 | static Quantum **DestroyPixelThreadSet(Quantum **pixels) |
| 1296 | { |
| 1297 | register long |
| 1298 | i; |
| 1299 | |
| 1300 | assert(pixels != (Quantum **) NULL); |
| 1301 | for (i=0; i < (long) GetOpenMPMaximumThreads(); i++) |
| 1302 | if (pixels[i] != (Quantum *) NULL) |
| 1303 | pixels[i]=(Quantum *) RelinquishMagickMemory(pixels[i]); |
| 1304 | pixels=(Quantum **) RelinquishAlignedMemory(pixels); |
| 1305 | return(pixels); |
| 1306 | } |
| 1307 | |
| 1308 | static Quantum **AcquirePixelThreadSet(const size_t count) |
| 1309 | { |
| 1310 | register long |
| 1311 | i; |
| 1312 | |
| 1313 | Quantum |
| 1314 | **pixels; |
| 1315 | |
| 1316 | unsigned long |
| 1317 | number_threads; |
| 1318 | |
| 1319 | number_threads=GetOpenMPMaximumThreads(); |
| 1320 | pixels=(Quantum **) AcquireAlignedMemory(number_threads,sizeof(*pixels)); |
| 1321 | if (pixels == (Quantum **) NULL) |
| 1322 | return((Quantum **) NULL); |
| 1323 | (void) ResetMagickMemory(pixels,0,number_threads*sizeof(*pixels)); |
| 1324 | for (i=0; i < (long) number_threads; i++) |
| 1325 | { |
| 1326 | pixels[i]=(Quantum *) AcquireQuantumMemory(count,sizeof(**pixels)); |
| 1327 | if (pixels[i] == (Quantum *) NULL) |
| 1328 | return(DestroyPixelThreadSet(pixels)); |
| 1329 | } |
| 1330 | return(pixels); |
| 1331 | } |
| 1332 | |
| 1333 | static void Hull(const long x_offset,const long y_offset, |
| 1334 | const unsigned long columns,const unsigned long rows,Quantum *f,Quantum *g, |
| 1335 | const int polarity) |
| 1336 | { |
| 1337 | long |
| 1338 | y; |
| 1339 | |
| 1340 | MagickRealType |
| 1341 | v; |
| 1342 | |
| 1343 | register long |
| 1344 | x; |
| 1345 | |
| 1346 | register Quantum |
| 1347 | *p, |
| 1348 | *q, |
| 1349 | *r, |
| 1350 | *s; |
| 1351 | |
| 1352 | assert(f != (Quantum *) NULL); |
| 1353 | assert(g != (Quantum *) NULL); |
| 1354 | p=f+(columns+2); |
| 1355 | q=g+(columns+2); |
| 1356 | r=p+(y_offset*((long) columns+2)+x_offset); |
| 1357 | for (y=0; y < (long) rows; y++) |
| 1358 | { |
| 1359 | p++; |
| 1360 | q++; |
| 1361 | r++; |
| 1362 | if (polarity > 0) |
| 1363 | for (x=(long) columns; x != 0; x--) |
| 1364 | { |
| 1365 | v=(MagickRealType) (*p); |
| 1366 | if ((MagickRealType) *r >= (v+(MagickRealType) ScaleCharToQuantum(2))) |
| 1367 | v+=ScaleCharToQuantum(1); |
| 1368 | *q=(Quantum) v; |
| 1369 | p++; |
| 1370 | q++; |
| 1371 | r++; |
| 1372 | } |
| 1373 | else |
| 1374 | for (x=(long) columns; x != 0; x--) |
| 1375 | { |
| 1376 | v=(MagickRealType) (*p); |
| 1377 | if ((MagickRealType) *r <= (v-(MagickRealType) ScaleCharToQuantum(2))) |
| 1378 | v-=(long) ScaleCharToQuantum(1); |
| 1379 | *q=(Quantum) v; |
| 1380 | p++; |
| 1381 | q++; |
| 1382 | r++; |
| 1383 | } |
| 1384 | p++; |
| 1385 | q++; |
| 1386 | r++; |
| 1387 | } |
| 1388 | p=f+(columns+2); |
| 1389 | q=g+(columns+2); |
| 1390 | r=q+(y_offset*((long) columns+2)+x_offset); |
| 1391 | s=q-(y_offset*((long) columns+2)+x_offset); |
| 1392 | for (y=0; y < (long) rows; y++) |
| 1393 | { |
| 1394 | p++; |
| 1395 | q++; |
| 1396 | r++; |
| 1397 | s++; |
| 1398 | if (polarity > 0) |
| 1399 | for (x=(long) columns; x != 0; x--) |
| 1400 | { |
| 1401 | v=(MagickRealType) (*q); |
| 1402 | if (((MagickRealType) *s >= |
| 1403 | (v+(MagickRealType) ScaleCharToQuantum(2))) && |
| 1404 | ((MagickRealType) *r > v)) |
| 1405 | v+=ScaleCharToQuantum(1); |
| 1406 | *p=(Quantum) v; |
| 1407 | p++; |
| 1408 | q++; |
| 1409 | r++; |
| 1410 | s++; |
| 1411 | } |
| 1412 | else |
| 1413 | for (x=(long) columns; x != 0; x--) |
| 1414 | { |
| 1415 | v=(MagickRealType) (*q); |
| 1416 | if (((MagickRealType) *s <= |
| 1417 | (v-(MagickRealType) ScaleCharToQuantum(2))) && |
| 1418 | ((MagickRealType) *r < v)) |
| 1419 | v-=(MagickRealType) ScaleCharToQuantum(1); |
| 1420 | *p=(Quantum) v; |
| 1421 | p++; |
| 1422 | q++; |
| 1423 | r++; |
| 1424 | s++; |
| 1425 | } |
| 1426 | p++; |
| 1427 | q++; |
| 1428 | r++; |
| 1429 | s++; |
| 1430 | } |
| 1431 | } |
| 1432 | |
| 1433 | MagickExport Image *DespeckleImage(const Image *image,ExceptionInfo *exception) |
| 1434 | { |
| 1435 | #define DespeckleImageTag "Despeckle/Image" |
| 1436 | |
| 1437 | Image |
| 1438 | *despeckle_image; |
| 1439 | |
| 1440 | long |
| 1441 | channel; |
| 1442 | |
| 1443 | MagickBooleanType |
| 1444 | status; |
| 1445 | |
| 1446 | Quantum |
| 1447 | **buffers, |
| 1448 | **pixels; |
| 1449 | |
| 1450 | size_t |
| 1451 | length; |
| 1452 | |
| 1453 | static const int |
| 1454 | X[4]= {0, 1, 1,-1}, |
| 1455 | Y[4]= {1, 0, 1, 1}; |
| 1456 | |
| 1457 | CacheView |
| 1458 | *despeckle_view, |
| 1459 | *image_view; |
| 1460 | |
| 1461 | /* |
| 1462 | Allocate despeckled image. |
| 1463 | */ |
| 1464 | assert(image != (const Image *) NULL); |
| 1465 | assert(image->signature == MagickSignature); |
| 1466 | if (image->debug != MagickFalse) |
| 1467 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 1468 | assert(exception != (ExceptionInfo *) NULL); |
| 1469 | assert(exception->signature == MagickSignature); |
| 1470 | despeckle_image=CloneImage(image,image->columns,image->rows,MagickTrue, |
| 1471 | exception); |
| 1472 | if (despeckle_image == (Image *) NULL) |
| 1473 | return((Image *) NULL); |
| 1474 | if (SetImageStorageClass(despeckle_image,DirectClass) == MagickFalse) |
| 1475 | { |
| 1476 | InheritException(exception,&despeckle_image->exception); |
| 1477 | despeckle_image=DestroyImage(despeckle_image); |
| 1478 | return((Image *) NULL); |
| 1479 | } |
| 1480 | /* |
| 1481 | Allocate image buffers. |
| 1482 | */ |
| 1483 | length=(size_t) ((image->columns+2)*(image->rows+2)); |
| 1484 | pixels=AcquirePixelThreadSet(length); |
| 1485 | buffers=AcquirePixelThreadSet(length); |
| 1486 | if ((pixels == (Quantum **) NULL) || (buffers == (Quantum **) NULL)) |
| 1487 | { |
| 1488 | if (buffers != (Quantum **) NULL) |
| 1489 | buffers=DestroyPixelThreadSet(buffers); |
| 1490 | if (pixels != (Quantum **) NULL) |
| 1491 | pixels=DestroyPixelThreadSet(pixels); |
| 1492 | despeckle_image=DestroyImage(despeckle_image); |
| 1493 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 1494 | } |
| 1495 | /* |
| 1496 | Reduce speckle in the image. |
| 1497 | */ |
| 1498 | status=MagickTrue; |
| 1499 | image_view=AcquireCacheView(image); |
| 1500 | despeckle_view=AcquireCacheView(despeckle_image); |
| 1501 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 1502 | #pragma omp parallel for schedule(dynamic,1) shared(status) |
| 1503 | #endif |
| 1504 | for (channel=0; channel <= 3; channel++) |
| 1505 | { |
| 1506 | long |
| 1507 | j, |
| 1508 | y; |
| 1509 | |
| 1510 | register long |
| 1511 | i, |
| 1512 | x; |
| 1513 | |
| 1514 | register Quantum |
| 1515 | *buffer, |
| 1516 | *pixel; |
| 1517 | |
| 1518 | if (status == MagickFalse) |
| 1519 | continue; |
| 1520 | pixel=pixels[GetOpenMPThreadId()]; |
| 1521 | (void) ResetMagickMemory(pixel,0,length*sizeof(*pixel)); |
| 1522 | j=(long) image->columns+2; |
| 1523 | for (y=0; y < (long) image->rows; y++) |
| 1524 | { |
| 1525 | register const PixelPacket |
| 1526 | *__restrict p; |
| 1527 | |
| 1528 | p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception); |
| 1529 | if (p == (const PixelPacket *) NULL) |
| 1530 | break; |
| 1531 | j++; |
| 1532 | for (x=0; x < (long) image->columns; x++) |
| 1533 | { |
| 1534 | switch (channel) |
| 1535 | { |
| 1536 | case 0: pixel[j]=p->red; break; |
| 1537 | case 1: pixel[j]=p->green; break; |
| 1538 | case 2: pixel[j]=p->blue; break; |
| 1539 | case 3: pixel[j]=p->opacity; break; |
| 1540 | default: break; |
| 1541 | } |
| 1542 | p++; |
| 1543 | j++; |
| 1544 | } |
| 1545 | j++; |
| 1546 | } |
| 1547 | buffer=buffers[GetOpenMPThreadId()]; |
| 1548 | (void) ResetMagickMemory(buffer,0,length*sizeof(*buffer)); |
| 1549 | for (i=0; i < 4; i++) |
| 1550 | { |
| 1551 | Hull(X[i],Y[i],image->columns,image->rows,pixel,buffer,1); |
| 1552 | Hull(-X[i],-Y[i],image->columns,image->rows,pixel,buffer,1); |
| 1553 | Hull(-X[i],-Y[i],image->columns,image->rows,pixel,buffer,-1); |
| 1554 | Hull(X[i],Y[i],image->columns,image->rows,pixel,buffer,-1); |
| 1555 | } |
| 1556 | j=(long) image->columns+2; |
| 1557 | for (y=0; y < (long) image->rows; y++) |
| 1558 | { |
| 1559 | MagickBooleanType |
| 1560 | sync; |
| 1561 | |
| 1562 | register PixelPacket |
| 1563 | *__restrict q; |
| 1564 | |
| 1565 | q=GetCacheViewAuthenticPixels(despeckle_view,0,y,despeckle_image->columns, |
| 1566 | 1,exception); |
| 1567 | if (q == (PixelPacket *) NULL) |
| 1568 | break; |
| 1569 | j++; |
| 1570 | for (x=0; x < (long) image->columns; x++) |
| 1571 | { |
| 1572 | switch (channel) |
| 1573 | { |
| 1574 | case 0: q->red=pixel[j]; break; |
| 1575 | case 1: q->green=pixel[j]; break; |
| 1576 | case 2: q->blue=pixel[j]; break; |
| 1577 | case 3: q->opacity=pixel[j]; break; |
| 1578 | default: break; |
| 1579 | } |
| 1580 | q++; |
| 1581 | j++; |
| 1582 | } |
| 1583 | sync=SyncCacheViewAuthenticPixels(despeckle_view,exception); |
| 1584 | if (sync == MagickFalse) |
| 1585 | { |
| 1586 | status=MagickFalse; |
| 1587 | break; |
| 1588 | } |
| 1589 | j++; |
| 1590 | } |
| 1591 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 1592 | { |
| 1593 | MagickBooleanType |
| 1594 | proceed; |
| 1595 | |
| 1596 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 1597 | #pragma omp critical (MagickCore_DespeckleImage) |
| 1598 | #endif |
| 1599 | proceed=SetImageProgress(image,DespeckleImageTag,channel,3); |
| 1600 | if (proceed == MagickFalse) |
| 1601 | status=MagickFalse; |
| 1602 | } |
| 1603 | } |
| 1604 | despeckle_view=DestroyCacheView(despeckle_view); |
| 1605 | image_view=DestroyCacheView(image_view); |
| 1606 | buffers=DestroyPixelThreadSet(buffers); |
| 1607 | pixels=DestroyPixelThreadSet(pixels); |
| 1608 | despeckle_image->type=image->type; |
| 1609 | if (status == MagickFalse) |
| 1610 | despeckle_image=DestroyImage(despeckle_image); |
| 1611 | return(despeckle_image); |
| 1612 | } |
| 1613 | |
| 1614 | /* |
| 1615 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1616 | % % |
| 1617 | % % |
| 1618 | % % |
| 1619 | % E d g e I m a g e % |
| 1620 | % % |
| 1621 | % % |
| 1622 | % % |
| 1623 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1624 | % |
| 1625 | % EdgeImage() finds edges in an image. Radius defines the radius of the |
| 1626 | % convolution filter. Use a radius of 0 and EdgeImage() selects a suitable |
| 1627 | % radius for you. |
| 1628 | % |
| 1629 | % The format of the EdgeImage method is: |
| 1630 | % |
| 1631 | % Image *EdgeImage(const Image *image,const double radius, |
| 1632 | % ExceptionInfo *exception) |
| 1633 | % |
| 1634 | % A description of each parameter follows: |
| 1635 | % |
| 1636 | % o image: the image. |
| 1637 | % |
| 1638 | % o radius: the radius of the pixel neighborhood. |
| 1639 | % |
| 1640 | % o exception: return any errors or warnings in this structure. |
| 1641 | % |
| 1642 | */ |
| 1643 | MagickExport Image *EdgeImage(const Image *image,const double radius, |
| 1644 | ExceptionInfo *exception) |
| 1645 | { |
| 1646 | Image |
| 1647 | *edge_image; |
| 1648 | |
| 1649 | double |
| 1650 | *kernel; |
| 1651 | |
| 1652 | register long |
| 1653 | i; |
| 1654 | |
| 1655 | unsigned long |
| 1656 | width; |
| 1657 | |
| 1658 | assert(image != (const Image *) NULL); |
| 1659 | assert(image->signature == MagickSignature); |
| 1660 | if (image->debug != MagickFalse) |
| 1661 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 1662 | assert(exception != (ExceptionInfo *) NULL); |
| 1663 | assert(exception->signature == MagickSignature); |
| 1664 | width=GetOptimalKernelWidth1D(radius,0.5); |
| 1665 | kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel)); |
| 1666 | if (kernel == (double *) NULL) |
| 1667 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 1668 | for (i=0; i < (long) (width*width); i++) |
| 1669 | kernel[i]=(-1.0); |
| 1670 | kernel[i/2]=(double) (width*width-1.0); |
| 1671 | edge_image=ConvolveImage(image,width,kernel,exception); |
| 1672 | kernel=(double *) RelinquishMagickMemory(kernel); |
| 1673 | return(edge_image); |
| 1674 | } |
| 1675 | |
| 1676 | /* |
| 1677 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1678 | % % |
| 1679 | % % |
| 1680 | % % |
| 1681 | % E m b o s s I m a g e % |
| 1682 | % % |
| 1683 | % % |
| 1684 | % % |
| 1685 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1686 | % |
| 1687 | % EmbossImage() returns a grayscale image with a three-dimensional effect. |
| 1688 | % We convolve the image with a Gaussian operator of the given radius and |
| 1689 | % standard deviation (sigma). For reasonable results, radius should be |
| 1690 | % larger than sigma. Use a radius of 0 and Emboss() selects a suitable |
| 1691 | % radius for you. |
| 1692 | % |
| 1693 | % The format of the EmbossImage method is: |
| 1694 | % |
| 1695 | % Image *EmbossImage(const Image *image,const double radius, |
| 1696 | % const double sigma,ExceptionInfo *exception) |
| 1697 | % |
| 1698 | % A description of each parameter follows: |
| 1699 | % |
| 1700 | % o image: the image. |
| 1701 | % |
| 1702 | % o radius: the radius of the pixel neighborhood. |
| 1703 | % |
| 1704 | % o sigma: the standard deviation of the Gaussian, in pixels. |
| 1705 | % |
| 1706 | % o exception: return any errors or warnings in this structure. |
| 1707 | % |
| 1708 | */ |
| 1709 | MagickExport Image *EmbossImage(const Image *image,const double radius, |
| 1710 | const double sigma,ExceptionInfo *exception) |
| 1711 | { |
| 1712 | double |
| 1713 | *kernel; |
| 1714 | |
| 1715 | Image |
| 1716 | *emboss_image; |
| 1717 | |
| 1718 | long |
| 1719 | j; |
| 1720 | |
| 1721 | MagickRealType |
| 1722 | alpha; |
| 1723 | |
| 1724 | register long |
| 1725 | i, |
| 1726 | u, |
| 1727 | v; |
| 1728 | |
| 1729 | unsigned long |
| 1730 | width; |
| 1731 | |
| 1732 | assert(image != (Image *) NULL); |
| 1733 | assert(image->signature == MagickSignature); |
| 1734 | if (image->debug != MagickFalse) |
| 1735 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 1736 | assert(exception != (ExceptionInfo *) NULL); |
| 1737 | assert(exception->signature == MagickSignature); |
| 1738 | width=GetOptimalKernelWidth2D(radius,sigma); |
| 1739 | kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel)); |
| 1740 | if (kernel == (double *) NULL) |
| 1741 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 1742 | i=0; |
| 1743 | j=(long) width/2; |
| 1744 | for (v=(-((long) width/2)); v <= (long) (width/2); v++) |
| 1745 | { |
| 1746 | for (u=(-((long) width/2)); u <= (long) (width/2); u++) |
| 1747 | { |
| 1748 | alpha=exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma)); |
| 1749 | kernel[i]=(double) (((u < 0) || (v < 0) ? -8.0 : 8.0)*alpha/ |
| 1750 | (2.0*MagickPI*MagickSigma*MagickSigma)); |
| 1751 | if (u != j) |
| 1752 | kernel[i]=0.0; |
| 1753 | i++; |
| 1754 | } |
| 1755 | j--; |
| 1756 | } |
| 1757 | emboss_image=ConvolveImage(image,width,kernel,exception); |
| 1758 | if (emboss_image != (Image *) NULL) |
| 1759 | (void) EqualizeImage(emboss_image); |
| 1760 | kernel=(double *) RelinquishMagickMemory(kernel); |
| 1761 | return(emboss_image); |
| 1762 | } |
| 1763 | |
| 1764 | /* |
| 1765 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1766 | % % |
| 1767 | % % |
| 1768 | % % |
| 1769 | % G a u s s i a n B l u r I m a g e % |
| 1770 | % % |
| 1771 | % % |
| 1772 | % % |
| 1773 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1774 | % |
| 1775 | % GaussianBlurImage() blurs an image. We convolve the image with a |
| 1776 | % Gaussian operator of the given radius and standard deviation (sigma). |
| 1777 | % For reasonable results, the radius should be larger than sigma. Use a |
| 1778 | % radius of 0 and GaussianBlurImage() selects a suitable radius for you |
| 1779 | % |
| 1780 | % The format of the GaussianBlurImage method is: |
| 1781 | % |
| 1782 | % Image *GaussianBlurImage(const Image *image,onst double radius, |
| 1783 | % const double sigma,ExceptionInfo *exception) |
| 1784 | % Image *GaussianBlurImageChannel(const Image *image, |
| 1785 | % const ChannelType channel,const double radius,const double sigma, |
| 1786 | % ExceptionInfo *exception) |
| 1787 | % |
| 1788 | % A description of each parameter follows: |
| 1789 | % |
| 1790 | % o image: the image. |
| 1791 | % |
| 1792 | % o channel: the channel type. |
| 1793 | % |
| 1794 | % o radius: the radius of the Gaussian, in pixels, not counting the center |
| 1795 | % pixel. |
| 1796 | % |
| 1797 | % o sigma: the standard deviation of the Gaussian, in pixels. |
| 1798 | % |
| 1799 | % o exception: return any errors or warnings in this structure. |
| 1800 | % |
| 1801 | */ |
| 1802 | |
| 1803 | MagickExport Image *GaussianBlurImage(const Image *image,const double radius, |
| 1804 | const double sigma,ExceptionInfo *exception) |
| 1805 | { |
| 1806 | Image |
| 1807 | *blur_image; |
| 1808 | |
| 1809 | blur_image=GaussianBlurImageChannel(image,DefaultChannels,radius,sigma, |
| 1810 | exception); |
| 1811 | return(blur_image); |
| 1812 | } |
| 1813 | |
| 1814 | MagickExport Image *GaussianBlurImageChannel(const Image *image, |
| 1815 | const ChannelType channel,const double radius,const double sigma, |
| 1816 | ExceptionInfo *exception) |
| 1817 | { |
| 1818 | double |
| 1819 | *kernel; |
| 1820 | |
| 1821 | Image |
| 1822 | *blur_image; |
| 1823 | |
| 1824 | MagickRealType |
| 1825 | alpha; |
| 1826 | |
| 1827 | register long |
| 1828 | i, |
| 1829 | u, |
| 1830 | v; |
| 1831 | |
| 1832 | unsigned long |
| 1833 | width; |
| 1834 | |
| 1835 | assert(image != (const Image *) NULL); |
| 1836 | assert(image->signature == MagickSignature); |
| 1837 | if (image->debug != MagickFalse) |
| 1838 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 1839 | assert(exception != (ExceptionInfo *) NULL); |
| 1840 | assert(exception->signature == MagickSignature); |
| 1841 | width=GetOptimalKernelWidth2D(radius,sigma); |
| 1842 | kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel)); |
| 1843 | if (kernel == (double *) NULL) |
| 1844 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 1845 | i=0; |
| 1846 | for (v=(-((long) width/2)); v <= (long) (width/2); v++) |
| 1847 | { |
| 1848 | for (u=(-((long) width/2)); u <= (long) (width/2); u++) |
| 1849 | { |
| 1850 | alpha=exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma)); |
| 1851 | kernel[i]=(double) (alpha/(2.0*MagickPI*MagickSigma*MagickSigma)); |
| 1852 | i++; |
| 1853 | } |
| 1854 | } |
| 1855 | blur_image=ConvolveImageChannel(image,channel,width,kernel,exception); |
| 1856 | kernel=(double *) RelinquishMagickMemory(kernel); |
| 1857 | return(blur_image); |
| 1858 | } |
| 1859 | |
| 1860 | /* |
| 1861 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1862 | % % |
| 1863 | % % |
| 1864 | % % |
| 1865 | % M e d i a n F i l t e r I m a g e % |
| 1866 | % % |
| 1867 | % % |
| 1868 | % % |
| 1869 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1870 | % |
| 1871 | % MedianFilterImage() applies a digital filter that improves the quality |
| 1872 | % of a noisy image. Each pixel is replaced by the median in a set of |
| 1873 | % neighboring pixels as defined by radius. |
| 1874 | % |
| 1875 | % The algorithm was contributed by Mike Edmonds and implements an insertion |
| 1876 | % sort for selecting median color-channel values. For more on this algorithm |
| 1877 | % see "Skip Lists: A probabilistic Alternative to Balanced Trees" by William |
| 1878 | % Pugh in the June 1990 of Communications of the ACM. |
| 1879 | % |
| 1880 | % The format of the MedianFilterImage method is: |
| 1881 | % |
| 1882 | % Image *MedianFilterImage(const Image *image,const double radius, |
| 1883 | % ExceptionInfo *exception) |
| 1884 | % |
| 1885 | % A description of each parameter follows: |
| 1886 | % |
| 1887 | % o image: the image. |
| 1888 | % |
| 1889 | % o radius: the radius of the pixel neighborhood. |
| 1890 | % |
| 1891 | % o exception: return any errors or warnings in this structure. |
| 1892 | % |
| 1893 | */ |
| 1894 | |
| 1895 | #define MedianListChannels 5 |
| 1896 | |
| 1897 | typedef struct _MedianListNode |
| 1898 | { |
| 1899 | unsigned long |
| 1900 | next[9], |
| 1901 | count, |
| 1902 | signature; |
| 1903 | } MedianListNode; |
| 1904 | |
| 1905 | typedef struct _MedianSkipList |
| 1906 | { |
| 1907 | long |
| 1908 | level; |
| 1909 | |
| 1910 | MedianListNode |
| 1911 | *nodes; |
| 1912 | } MedianSkipList; |
| 1913 | |
| 1914 | typedef struct _MedianPixelList |
| 1915 | { |
| 1916 | unsigned long |
| 1917 | center, |
| 1918 | seed, |
| 1919 | signature; |
| 1920 | |
| 1921 | MedianSkipList |
| 1922 | lists[MedianListChannels]; |
| 1923 | } MedianPixelList; |
| 1924 | |
| 1925 | static MedianPixelList *DestroyMedianPixelList(MedianPixelList *pixel_list) |
| 1926 | { |
| 1927 | register long |
| 1928 | i; |
| 1929 | |
| 1930 | if (pixel_list == (MedianPixelList *) NULL) |
| 1931 | return((MedianPixelList *) NULL); |
| 1932 | for (i=0; i < MedianListChannels; i++) |
| 1933 | if (pixel_list->lists[i].nodes != (MedianListNode *) NULL) |
| 1934 | pixel_list->lists[i].nodes=(MedianListNode *) RelinquishMagickMemory( |
| 1935 | pixel_list->lists[i].nodes); |
| 1936 | pixel_list=(MedianPixelList *) RelinquishAlignedMemory(pixel_list); |
| 1937 | return(pixel_list); |
| 1938 | } |
| 1939 | |
| 1940 | static MedianPixelList **DestroyMedianPixelListThreadSet( |
| 1941 | MedianPixelList **pixel_list) |
| 1942 | { |
| 1943 | register long |
| 1944 | i; |
| 1945 | |
| 1946 | assert(pixel_list != (MedianPixelList **) NULL); |
| 1947 | for (i=0; i < (long) GetOpenMPMaximumThreads(); i++) |
| 1948 | if (pixel_list[i] != (MedianPixelList *) NULL) |
| 1949 | pixel_list[i]=DestroyMedianPixelList(pixel_list[i]); |
| 1950 | pixel_list=(MedianPixelList **) RelinquishAlignedMemory(pixel_list); |
| 1951 | return(pixel_list); |
| 1952 | } |
| 1953 | |
| 1954 | static MedianPixelList *AcquireMedianPixelList(const unsigned long width) |
| 1955 | { |
| 1956 | MedianPixelList |
| 1957 | *pixel_list; |
| 1958 | |
| 1959 | register long |
| 1960 | i; |
| 1961 | |
| 1962 | pixel_list=(MedianPixelList *) AcquireAlignedMemory(1,sizeof(*pixel_list)); |
| 1963 | if (pixel_list == (MedianPixelList *) NULL) |
| 1964 | return(pixel_list); |
| 1965 | (void) ResetMagickMemory((void *) pixel_list,0,sizeof(*pixel_list)); |
| 1966 | pixel_list->center=width*width/2; |
| 1967 | for (i=0; i < MedianListChannels; i++) |
| 1968 | { |
| 1969 | pixel_list->lists[i].nodes=(MedianListNode *) AcquireQuantumMemory(65537UL, |
| 1970 | sizeof(*pixel_list->lists[i].nodes)); |
| 1971 | if (pixel_list->lists[i].nodes == (MedianListNode *) NULL) |
| 1972 | return(DestroyMedianPixelList(pixel_list)); |
| 1973 | (void) ResetMagickMemory(pixel_list->lists[i].nodes,0,65537UL* |
| 1974 | sizeof(*pixel_list->lists[i].nodes)); |
| 1975 | } |
| 1976 | pixel_list->signature=MagickSignature; |
| 1977 | return(pixel_list); |
| 1978 | } |
| 1979 | |
| 1980 | static MedianPixelList **AcquireMedianPixelListThreadSet( |
| 1981 | const unsigned long width) |
| 1982 | { |
| 1983 | register long |
| 1984 | i; |
| 1985 | |
| 1986 | MedianPixelList |
| 1987 | **pixel_list; |
| 1988 | |
| 1989 | unsigned long |
| 1990 | number_threads; |
| 1991 | |
| 1992 | number_threads=GetOpenMPMaximumThreads(); |
| 1993 | pixel_list=(MedianPixelList **) AcquireAlignedMemory(number_threads, |
| 1994 | sizeof(*pixel_list)); |
| 1995 | if (pixel_list == (MedianPixelList **) NULL) |
| 1996 | return((MedianPixelList **) NULL); |
| 1997 | (void) ResetMagickMemory(pixel_list,0,number_threads*sizeof(*pixel_list)); |
| 1998 | for (i=0; i < (long) number_threads; i++) |
| 1999 | { |
| 2000 | pixel_list[i]=AcquireMedianPixelList(width); |
| 2001 | if (pixel_list[i] == (MedianPixelList *) NULL) |
| 2002 | return(DestroyMedianPixelListThreadSet(pixel_list)); |
| 2003 | } |
| 2004 | return(pixel_list); |
| 2005 | } |
| 2006 | |
| 2007 | static void AddNodeMedianPixelList(MedianPixelList *pixel_list, |
| 2008 | const long channel,const unsigned long color) |
| 2009 | { |
| 2010 | register long |
| 2011 | level; |
| 2012 | |
| 2013 | register MedianSkipList |
| 2014 | *list; |
| 2015 | |
| 2016 | unsigned long |
| 2017 | search, |
| 2018 | update[9]; |
| 2019 | |
| 2020 | /* |
| 2021 | Initialize the node. |
| 2022 | */ |
| 2023 | list=pixel_list->lists+channel; |
| 2024 | list->nodes[color].signature=pixel_list->signature; |
| 2025 | list->nodes[color].count=1; |
| 2026 | /* |
| 2027 | Determine where it belongs in the list. |
| 2028 | */ |
| 2029 | search=65536UL; |
| 2030 | for (level=list->level; level >= 0; level--) |
| 2031 | { |
| 2032 | while (list->nodes[search].next[level] < color) |
| 2033 | search=list->nodes[search].next[level]; |
| 2034 | update[level]=search; |
| 2035 | } |
| 2036 | /* |
| 2037 | Generate a pseudo-random level for this node. |
| 2038 | */ |
| 2039 | for (level=0; ; level++) |
| 2040 | { |
| 2041 | pixel_list->seed=(pixel_list->seed*42893621L)+1L; |
| 2042 | if ((pixel_list->seed & 0x300) != 0x300) |
| 2043 | break; |
| 2044 | } |
| 2045 | if (level > 8) |
| 2046 | level=8; |
| 2047 | if (level > (list->level+2)) |
| 2048 | level=list->level+2; |
| 2049 | /* |
| 2050 | If we're raising the list's level, link back to the root node. |
| 2051 | */ |
| 2052 | while (level > list->level) |
| 2053 | { |
| 2054 | list->level++; |
| 2055 | update[list->level]=65536UL; |
| 2056 | } |
| 2057 | /* |
| 2058 | Link the node into the skip-list. |
| 2059 | */ |
| 2060 | do |
| 2061 | { |
| 2062 | list->nodes[color].next[level]=list->nodes[update[level]].next[level]; |
| 2063 | list->nodes[update[level]].next[level]=color; |
| 2064 | } |
| 2065 | while (level-- > 0); |
| 2066 | } |
| 2067 | |
| 2068 | static MagickPixelPacket GetMedianPixelList(MedianPixelList *pixel_list) |
| 2069 | { |
| 2070 | MagickPixelPacket |
| 2071 | pixel; |
| 2072 | |
| 2073 | register long |
| 2074 | channel; |
| 2075 | |
| 2076 | register MedianSkipList |
| 2077 | *list; |
| 2078 | |
| 2079 | unsigned long |
| 2080 | center, |
| 2081 | color, |
| 2082 | count; |
| 2083 | |
| 2084 | unsigned short |
| 2085 | channels[MedianListChannels]; |
| 2086 | |
| 2087 | /* |
| 2088 | Find the median value for each of the color. |
| 2089 | */ |
| 2090 | center=pixel_list->center; |
| 2091 | for (channel=0; channel < 5; channel++) |
| 2092 | { |
| 2093 | list=pixel_list->lists+channel; |
| 2094 | color=65536UL; |
| 2095 | count=0; |
| 2096 | do |
| 2097 | { |
| 2098 | color=list->nodes[color].next[0]; |
| 2099 | count+=list->nodes[color].count; |
| 2100 | } |
| 2101 | while (count <= center); |
| 2102 | channels[channel]=(unsigned short) color; |
| 2103 | } |
| 2104 | GetMagickPixelPacket((const Image *) NULL,&pixel); |
| 2105 | pixel.red=(MagickRealType) ScaleShortToQuantum(channels[0]); |
| 2106 | pixel.green=(MagickRealType) ScaleShortToQuantum(channels[1]); |
| 2107 | pixel.blue=(MagickRealType) ScaleShortToQuantum(channels[2]); |
| 2108 | pixel.opacity=(MagickRealType) ScaleShortToQuantum(channels[3]); |
| 2109 | pixel.index=(MagickRealType) ScaleShortToQuantum(channels[4]); |
| 2110 | return(pixel); |
| 2111 | } |
| 2112 | |
| 2113 | static inline void InsertMedianPixelList(const Image *image, |
| 2114 | const PixelPacket *pixel,const IndexPacket *indexes, |
| 2115 | MedianPixelList *pixel_list) |
| 2116 | { |
| 2117 | unsigned long |
| 2118 | signature; |
| 2119 | |
| 2120 | unsigned short |
| 2121 | index; |
| 2122 | |
| 2123 | index=ScaleQuantumToShort(pixel->red); |
| 2124 | signature=pixel_list->lists[0].nodes[index].signature; |
| 2125 | if (signature == pixel_list->signature) |
| 2126 | pixel_list->lists[0].nodes[index].count++; |
| 2127 | else |
| 2128 | AddNodeMedianPixelList(pixel_list,0,index); |
| 2129 | index=ScaleQuantumToShort(pixel->green); |
| 2130 | signature=pixel_list->lists[1].nodes[index].signature; |
| 2131 | if (signature == pixel_list->signature) |
| 2132 | pixel_list->lists[1].nodes[index].count++; |
| 2133 | else |
| 2134 | AddNodeMedianPixelList(pixel_list,1,index); |
| 2135 | index=ScaleQuantumToShort(pixel->blue); |
| 2136 | signature=pixel_list->lists[2].nodes[index].signature; |
| 2137 | if (signature == pixel_list->signature) |
| 2138 | pixel_list->lists[2].nodes[index].count++; |
| 2139 | else |
| 2140 | AddNodeMedianPixelList(pixel_list,2,index); |
| 2141 | index=ScaleQuantumToShort(pixel->opacity); |
| 2142 | signature=pixel_list->lists[3].nodes[index].signature; |
| 2143 | if (signature == pixel_list->signature) |
| 2144 | pixel_list->lists[3].nodes[index].count++; |
| 2145 | else |
| 2146 | AddNodeMedianPixelList(pixel_list,3,index); |
| 2147 | if (image->colorspace == CMYKColorspace) |
| 2148 | index=ScaleQuantumToShort(*indexes); |
| 2149 | signature=pixel_list->lists[4].nodes[index].signature; |
| 2150 | if (signature == pixel_list->signature) |
| 2151 | pixel_list->lists[4].nodes[index].count++; |
| 2152 | else |
| 2153 | AddNodeMedianPixelList(pixel_list,4,index); |
| 2154 | } |
| 2155 | |
| 2156 | static void ResetMedianPixelList(MedianPixelList *pixel_list) |
| 2157 | { |
| 2158 | int |
| 2159 | level; |
| 2160 | |
| 2161 | register long |
| 2162 | channel; |
| 2163 | |
| 2164 | register MedianListNode |
| 2165 | *root; |
| 2166 | |
| 2167 | register MedianSkipList |
| 2168 | *list; |
| 2169 | |
| 2170 | /* |
| 2171 | Reset the skip-list. |
| 2172 | */ |
| 2173 | for (channel=0; channel < 5; channel++) |
| 2174 | { |
| 2175 | list=pixel_list->lists+channel; |
| 2176 | root=list->nodes+65536UL; |
| 2177 | list->level=0; |
| 2178 | for (level=0; level < 9; level++) |
| 2179 | root->next[level]=65536UL; |
| 2180 | } |
| 2181 | pixel_list->seed=pixel_list->signature++; |
| 2182 | } |
| 2183 | |
| 2184 | MagickExport Image *MedianFilterImage(const Image *image,const double radius, |
| 2185 | ExceptionInfo *exception) |
| 2186 | { |
| 2187 | #define MedianFilterImageTag "MedianFilter/Image" |
| 2188 | |
| 2189 | Image |
| 2190 | *median_image; |
| 2191 | |
| 2192 | long |
| 2193 | progress, |
| 2194 | y; |
| 2195 | |
| 2196 | MagickBooleanType |
| 2197 | status; |
| 2198 | |
| 2199 | MedianPixelList |
| 2200 | **pixel_list; |
| 2201 | |
| 2202 | unsigned long |
| 2203 | width; |
| 2204 | |
| 2205 | CacheView |
| 2206 | *image_view, |
| 2207 | *median_view; |
| 2208 | |
| 2209 | /* |
| 2210 | Initialize median image attributes. |
| 2211 | */ |
| 2212 | assert(image != (Image *) NULL); |
| 2213 | assert(image->signature == MagickSignature); |
| 2214 | if (image->debug != MagickFalse) |
| 2215 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 2216 | assert(exception != (ExceptionInfo *) NULL); |
| 2217 | assert(exception->signature == MagickSignature); |
| 2218 | width=GetOptimalKernelWidth2D(radius,0.5); |
| 2219 | if ((image->columns < width) || (image->rows < width)) |
| 2220 | ThrowImageException(OptionError,"ImageSmallerThanKernelRadius"); |
| 2221 | median_image=CloneImage(image,image->columns,image->rows,MagickTrue, |
| 2222 | exception); |
| 2223 | if (median_image == (Image *) NULL) |
| 2224 | return((Image *) NULL); |
| 2225 | if (SetImageStorageClass(median_image,DirectClass) == MagickFalse) |
| 2226 | { |
| 2227 | InheritException(exception,&median_image->exception); |
| 2228 | median_image=DestroyImage(median_image); |
| 2229 | return((Image *) NULL); |
| 2230 | } |
| 2231 | pixel_list=AcquireMedianPixelListThreadSet(width); |
| 2232 | if (pixel_list == (MedianPixelList **) NULL) |
| 2233 | { |
| 2234 | median_image=DestroyImage(median_image); |
| 2235 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 2236 | } |
| 2237 | /* |
| 2238 | Median filter each image row. |
| 2239 | */ |
| 2240 | status=MagickTrue; |
| 2241 | progress=0; |
| 2242 | image_view=AcquireCacheView(image); |
| 2243 | median_view=AcquireCacheView(median_image); |
| 2244 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 2245 | #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| 2246 | #endif |
| 2247 | for (y=0; y < (long) median_image->rows; y++) |
| 2248 | { |
| 2249 | register const IndexPacket |
| 2250 | *__restrict indexes; |
| 2251 | |
| 2252 | register const PixelPacket |
| 2253 | *__restrict p; |
| 2254 | |
| 2255 | register IndexPacket |
| 2256 | *__restrict median_indexes; |
| 2257 | |
| 2258 | register long |
| 2259 | id, |
| 2260 | x; |
| 2261 | |
| 2262 | register PixelPacket |
| 2263 | *__restrict q; |
| 2264 | |
| 2265 | if (status == MagickFalse) |
| 2266 | continue; |
| 2267 | p=GetCacheViewVirtualPixels(image_view,-((long) width/2L),y-(long) (width/ |
| 2268 | 2L),image->columns+width,width,exception); |
| 2269 | q=QueueCacheViewAuthenticPixels(median_view,0,y,median_image->columns,1, |
| 2270 | exception); |
| 2271 | if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL)) |
| 2272 | { |
| 2273 | status=MagickFalse; |
| 2274 | continue; |
| 2275 | } |
| 2276 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 2277 | median_indexes=GetCacheViewAuthenticIndexQueue(median_view); |
| 2278 | id=GetOpenMPThreadId(); |
| 2279 | for (x=0; x < (long) median_image->columns; x++) |
| 2280 | { |
| 2281 | MagickPixelPacket |
| 2282 | pixel; |
| 2283 | |
| 2284 | register const PixelPacket |
| 2285 | *__restrict r; |
| 2286 | |
| 2287 | register const IndexPacket |
| 2288 | *__restrict s; |
| 2289 | |
| 2290 | register long |
| 2291 | u, |
| 2292 | v; |
| 2293 | |
| 2294 | r=p; |
| 2295 | s=indexes+x; |
| 2296 | ResetMedianPixelList(pixel_list[id]); |
| 2297 | for (v=0; v < (long) width; v++) |
| 2298 | { |
| 2299 | for (u=0; u < (long) width; u++) |
| 2300 | InsertMedianPixelList(image,r+u,s+u,pixel_list[id]); |
| 2301 | r+=image->columns+width; |
| 2302 | s+=image->columns+width; |
| 2303 | } |
| 2304 | pixel=GetMedianPixelList(pixel_list[id]); |
| 2305 | SetPixelPacket(median_image,&pixel,q,median_indexes+x); |
| 2306 | p++; |
| 2307 | q++; |
| 2308 | } |
| 2309 | if (SyncCacheViewAuthenticPixels(median_view,exception) == MagickFalse) |
| 2310 | status=MagickFalse; |
| 2311 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 2312 | { |
| 2313 | MagickBooleanType |
| 2314 | proceed; |
| 2315 | |
| 2316 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 2317 | #pragma omp critical (MagickCore_MedianFilterImage) |
| 2318 | #endif |
| 2319 | proceed=SetImageProgress(image,MedianFilterImageTag,progress++, |
| 2320 | image->rows); |
| 2321 | if (proceed == MagickFalse) |
| 2322 | status=MagickFalse; |
| 2323 | } |
| 2324 | } |
| 2325 | median_view=DestroyCacheView(median_view); |
| 2326 | image_view=DestroyCacheView(image_view); |
| 2327 | pixel_list=DestroyMedianPixelListThreadSet(pixel_list); |
| 2328 | return(median_image); |
| 2329 | } |
| 2330 | |
| 2331 | /* |
| 2332 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 2333 | % % |
| 2334 | % % |
| 2335 | % % |
| 2336 | % M o t i o n B l u r I m a g e % |
| 2337 | % % |
| 2338 | % % |
| 2339 | % % |
| 2340 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 2341 | % |
| 2342 | % MotionBlurImage() simulates motion blur. We convolve the image with a |
| 2343 | % Gaussian operator of the given radius and standard deviation (sigma). |
| 2344 | % For reasonable results, radius should be larger than sigma. Use a |
| 2345 | % radius of 0 and MotionBlurImage() selects a suitable radius for you. |
| 2346 | % Angle gives the angle of the blurring motion. |
| 2347 | % |
| 2348 | % Andrew Protano contributed this effect. |
| 2349 | % |
| 2350 | % The format of the MotionBlurImage method is: |
| 2351 | % |
| 2352 | % Image *MotionBlurImage(const Image *image,const double radius, |
| 2353 | % const double sigma,const double angle,ExceptionInfo *exception) |
| 2354 | % Image *MotionBlurImageChannel(const Image *image,const ChannelType channel, |
| 2355 | % const double radius,const double sigma,const double angle, |
| 2356 | % ExceptionInfo *exception) |
| 2357 | % |
| 2358 | % A description of each parameter follows: |
| 2359 | % |
| 2360 | % o image: the image. |
| 2361 | % |
| 2362 | % o channel: the channel type. |
| 2363 | % |
| 2364 | % o radius: the radius of the Gaussian, in pixels, not counting the center |
| 2365 | % o radius: the radius of the Gaussian, in pixels, not counting |
| 2366 | % the center pixel. |
| 2367 | % |
| 2368 | % o sigma: the standard deviation of the Gaussian, in pixels. |
| 2369 | % |
| 2370 | % o angle: Apply the effect along this angle. |
| 2371 | % |
| 2372 | % o exception: return any errors or warnings in this structure. |
| 2373 | % |
| 2374 | */ |
| 2375 | |
| 2376 | static double *GetMotionBlurKernel(unsigned long width, |
| 2377 | const MagickRealType sigma) |
| 2378 | { |
| 2379 | #define KernelRank 3 |
| 2380 | |
| 2381 | double |
| 2382 | *kernel; |
| 2383 | |
| 2384 | long |
| 2385 | bias; |
| 2386 | |
| 2387 | MagickRealType |
| 2388 | alpha, |
| 2389 | normalize; |
| 2390 | |
| 2391 | register long |
| 2392 | i; |
| 2393 | |
| 2394 | /* |
| 2395 | Generate a 1-D convolution kernel. |
| 2396 | */ |
| 2397 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"..."); |
| 2398 | kernel=(double *) AcquireQuantumMemory((size_t) width,sizeof(*kernel)); |
| 2399 | if (kernel == (double *) NULL) |
| 2400 | return(kernel); |
| 2401 | (void) ResetMagickMemory(kernel,0,(size_t) width*sizeof(*kernel)); |
| 2402 | bias=(long) (KernelRank*width); |
| 2403 | for (i=0; i < (long) bias; i++) |
| 2404 | { |
| 2405 | alpha=exp((-((double) (i*i))/(double) (2.0*KernelRank*KernelRank* |
| 2406 | MagickSigma*MagickSigma))); |
| 2407 | kernel[i/KernelRank]+=(double) alpha/(MagickSQ2PI*sigma); |
| 2408 | } |
| 2409 | normalize=0.0; |
| 2410 | for (i=0; i < (long) width; i++) |
| 2411 | normalize+=kernel[i]; |
| 2412 | for (i=0; i < (long) width; i++) |
| 2413 | kernel[i]/=normalize; |
| 2414 | return(kernel); |
| 2415 | } |
| 2416 | |
| 2417 | MagickExport Image *MotionBlurImage(const Image *image,const double radius, |
| 2418 | const double sigma,const double angle,ExceptionInfo *exception) |
| 2419 | { |
| 2420 | Image |
| 2421 | *motion_blur; |
| 2422 | |
| 2423 | motion_blur=MotionBlurImageChannel(image,DefaultChannels,radius,sigma,angle, |
| 2424 | exception); |
| 2425 | return(motion_blur); |
| 2426 | } |
| 2427 | |
| 2428 | MagickExport Image *MotionBlurImageChannel(const Image *image, |
| 2429 | const ChannelType channel,const double radius,const double sigma, |
| 2430 | const double angle,ExceptionInfo *exception) |
| 2431 | { |
| 2432 | typedef struct _OffsetInfo |
| 2433 | { |
| 2434 | long |
| 2435 | x, |
| 2436 | y; |
| 2437 | } OffsetInfo; |
| 2438 | |
| 2439 | double |
| 2440 | *kernel; |
| 2441 | |
| 2442 | Image |
| 2443 | *blur_image; |
| 2444 | |
| 2445 | long |
| 2446 | progress, |
| 2447 | y; |
| 2448 | |
| 2449 | MagickBooleanType |
| 2450 | status; |
| 2451 | |
| 2452 | MagickPixelPacket |
| 2453 | zero; |
| 2454 | |
| 2455 | OffsetInfo |
| 2456 | *offset; |
| 2457 | |
| 2458 | PointInfo |
| 2459 | point; |
| 2460 | |
| 2461 | register long |
| 2462 | i; |
| 2463 | |
| 2464 | unsigned long |
| 2465 | width; |
| 2466 | |
| 2467 | CacheView |
| 2468 | *blur_view, |
| 2469 | *image_view; |
| 2470 | |
| 2471 | assert(image != (Image *) NULL); |
| 2472 | assert(image->signature == MagickSignature); |
| 2473 | if (image->debug != MagickFalse) |
| 2474 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 2475 | assert(exception != (ExceptionInfo *) NULL); |
| 2476 | width=GetOptimalKernelWidth1D(radius,sigma); |
| 2477 | kernel=GetMotionBlurKernel(width,sigma); |
| 2478 | if (kernel == (double *) NULL) |
| 2479 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 2480 | offset=(OffsetInfo *) AcquireQuantumMemory(width,sizeof(*offset)); |
| 2481 | if (offset == (OffsetInfo *) NULL) |
| 2482 | { |
| 2483 | kernel=(double *) RelinquishMagickMemory(kernel); |
| 2484 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 2485 | } |
| 2486 | blur_image=CloneImage(image,0,0,MagickTrue,exception); |
| 2487 | if (blur_image == (Image *) NULL) |
| 2488 | { |
| 2489 | kernel=(double *) RelinquishMagickMemory(kernel); |
| 2490 | offset=(OffsetInfo *) RelinquishMagickMemory(offset); |
| 2491 | return((Image *) NULL); |
| 2492 | } |
| 2493 | if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse) |
| 2494 | { |
| 2495 | kernel=(double *) RelinquishMagickMemory(kernel); |
| 2496 | offset=(OffsetInfo *) RelinquishMagickMemory(offset); |
| 2497 | InheritException(exception,&blur_image->exception); |
| 2498 | blur_image=DestroyImage(blur_image); |
| 2499 | return((Image *) NULL); |
| 2500 | } |
| 2501 | point.x=(double) width*sin(DegreesToRadians(angle)); |
| 2502 | point.y=(double) width*cos(DegreesToRadians(angle)); |
| 2503 | for (i=0; i < (long) width; i++) |
| 2504 | { |
| 2505 | offset[i].x=(long) ((i*point.y)/hypot(point.x,point.y)+0.5); |
| 2506 | offset[i].y=(long) ((i*point.x)/hypot(point.x,point.y)+0.5); |
| 2507 | } |
| 2508 | /* |
| 2509 | Motion blur image. |
| 2510 | */ |
| 2511 | status=MagickTrue; |
| 2512 | progress=0; |
| 2513 | GetMagickPixelPacket(image,&zero); |
| 2514 | image_view=AcquireCacheView(image); |
| 2515 | blur_view=AcquireCacheView(blur_image); |
| 2516 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 2517 | #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| 2518 | #endif |
| 2519 | for (y=0; y < (long) image->rows; y++) |
| 2520 | { |
| 2521 | register IndexPacket |
| 2522 | *__restrict blur_indexes; |
| 2523 | |
| 2524 | register long |
| 2525 | x; |
| 2526 | |
| 2527 | register PixelPacket |
| 2528 | *__restrict q; |
| 2529 | |
| 2530 | if (status == MagickFalse) |
| 2531 | continue; |
| 2532 | q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1, |
| 2533 | exception); |
| 2534 | if (q == (PixelPacket *) NULL) |
| 2535 | { |
| 2536 | status=MagickFalse; |
| 2537 | continue; |
| 2538 | } |
| 2539 | blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view); |
| 2540 | for (x=0; x < (long) image->columns; x++) |
| 2541 | { |
| 2542 | MagickPixelPacket |
| 2543 | qixel; |
| 2544 | |
| 2545 | PixelPacket |
| 2546 | pixel; |
| 2547 | |
| 2548 | register double |
| 2549 | *__restrict k; |
| 2550 | |
| 2551 | register long |
| 2552 | i; |
| 2553 | |
| 2554 | register const IndexPacket |
| 2555 | *__restrict indexes; |
| 2556 | |
| 2557 | k=kernel; |
| 2558 | qixel=zero; |
| 2559 | if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse)) |
| 2560 | { |
| 2561 | for (i=0; i < (long) width; i++) |
| 2562 | { |
| 2563 | (void) GetOneCacheViewVirtualPixel(image_view,x+offset[i].x,y+ |
| 2564 | offset[i].y,&pixel,exception); |
| 2565 | qixel.red+=(*k)*pixel.red; |
| 2566 | qixel.green+=(*k)*pixel.green; |
| 2567 | qixel.blue+=(*k)*pixel.blue; |
| 2568 | qixel.opacity+=(*k)*pixel.opacity; |
| 2569 | if (image->colorspace == CMYKColorspace) |
| 2570 | { |
| 2571 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 2572 | qixel.index+=(*k)*(*indexes); |
| 2573 | } |
| 2574 | k++; |
| 2575 | } |
| 2576 | if ((channel & RedChannel) != 0) |
| 2577 | q->red=RoundToQuantum(qixel.red); |
| 2578 | if ((channel & GreenChannel) != 0) |
| 2579 | q->green=RoundToQuantum(qixel.green); |
| 2580 | if ((channel & BlueChannel) != 0) |
| 2581 | q->blue=RoundToQuantum(qixel.blue); |
| 2582 | if ((channel & OpacityChannel) != 0) |
| 2583 | q->opacity=RoundToQuantum(qixel.opacity); |
| 2584 | if (((channel & IndexChannel) != 0) && |
| 2585 | (image->colorspace == CMYKColorspace)) |
| 2586 | blur_indexes[x]=(IndexPacket) RoundToQuantum(qixel.index); |
| 2587 | } |
| 2588 | else |
| 2589 | { |
| 2590 | MagickRealType |
| 2591 | alpha, |
| 2592 | gamma; |
| 2593 | |
| 2594 | alpha=0.0; |
| 2595 | gamma=0.0; |
| 2596 | for (i=0; i < (long) width; i++) |
| 2597 | { |
| 2598 | (void) GetOneCacheViewVirtualPixel(image_view,x+offset[i].x,y+ |
| 2599 | offset[i].y,&pixel,exception); |
| 2600 | alpha=(MagickRealType) (QuantumScale*(QuantumRange-pixel.opacity)); |
| 2601 | qixel.red+=(*k)*alpha*pixel.red; |
| 2602 | qixel.green+=(*k)*alpha*pixel.green; |
| 2603 | qixel.blue+=(*k)*alpha*pixel.blue; |
| 2604 | qixel.opacity+=(*k)*pixel.opacity; |
| 2605 | if (image->colorspace == CMYKColorspace) |
| 2606 | { |
| 2607 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 2608 | qixel.index+=(*k)*alpha*(*indexes); |
| 2609 | } |
| 2610 | gamma+=(*k)*alpha; |
| 2611 | k++; |
| 2612 | } |
| 2613 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma); |
| 2614 | if ((channel & RedChannel) != 0) |
| 2615 | q->red=RoundToQuantum(gamma*qixel.red); |
| 2616 | if ((channel & GreenChannel) != 0) |
| 2617 | q->green=RoundToQuantum(gamma*qixel.green); |
| 2618 | if ((channel & BlueChannel) != 0) |
| 2619 | q->blue=RoundToQuantum(gamma*qixel.blue); |
| 2620 | if ((channel & OpacityChannel) != 0) |
| 2621 | q->opacity=RoundToQuantum(qixel.opacity); |
| 2622 | if (((channel & IndexChannel) != 0) && |
| 2623 | (image->colorspace == CMYKColorspace)) |
| 2624 | blur_indexes[x]=(IndexPacket) RoundToQuantum(gamma*qixel.index); |
| 2625 | } |
| 2626 | q++; |
| 2627 | } |
| 2628 | if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse) |
| 2629 | status=MagickFalse; |
| 2630 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 2631 | { |
| 2632 | MagickBooleanType |
| 2633 | proceed; |
| 2634 | |
| 2635 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 2636 | #pragma omp critical (MagickCore_MotionBlurImageChannel) |
| 2637 | #endif |
| 2638 | proceed=SetImageProgress(image,BlurImageTag,progress++,image->rows); |
| 2639 | if (proceed == MagickFalse) |
| 2640 | status=MagickFalse; |
| 2641 | } |
| 2642 | } |
| 2643 | blur_view=DestroyCacheView(blur_view); |
| 2644 | image_view=DestroyCacheView(image_view); |
| 2645 | kernel=(double *) RelinquishMagickMemory(kernel); |
| 2646 | offset=(OffsetInfo *) RelinquishMagickMemory(offset); |
| 2647 | if (status == MagickFalse) |
| 2648 | blur_image=DestroyImage(blur_image); |
| 2649 | return(blur_image); |
| 2650 | } |
| 2651 | |
| 2652 | /* |
| 2653 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 2654 | % % |
| 2655 | % % |
| 2656 | % % |
| 2657 | % P r e v i e w I m a g e % |
| 2658 | % % |
| 2659 | % % |
| 2660 | % % |
| 2661 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 2662 | % |
| 2663 | % PreviewImage() tiles 9 thumbnails of the specified image with an image |
| 2664 | % processing operation applied with varying parameters. This may be helpful |
| 2665 | % pin-pointing an appropriate parameter for a particular image processing |
| 2666 | % operation. |
| 2667 | % |
| 2668 | % The format of the PreviewImages method is: |
| 2669 | % |
| 2670 | % Image *PreviewImages(const Image *image,const PreviewType preview, |
| 2671 | % ExceptionInfo *exception) |
| 2672 | % |
| 2673 | % A description of each parameter follows: |
| 2674 | % |
| 2675 | % o image: the image. |
| 2676 | % |
| 2677 | % o preview: the image processing operation. |
| 2678 | % |
| 2679 | % o exception: return any errors or warnings in this structure. |
| 2680 | % |
| 2681 | */ |
| 2682 | MagickExport Image *PreviewImage(const Image *image,const PreviewType preview, |
| 2683 | ExceptionInfo *exception) |
| 2684 | { |
| 2685 | #define NumberTiles 9 |
| 2686 | #define PreviewImageTag "Preview/Image" |
| 2687 | #define DefaultPreviewGeometry "204x204+10+10" |
| 2688 | |
| 2689 | char |
| 2690 | factor[MaxTextExtent], |
| 2691 | label[MaxTextExtent]; |
| 2692 | |
| 2693 | double |
| 2694 | degrees, |
| 2695 | gamma, |
| 2696 | percentage, |
| 2697 | radius, |
| 2698 | sigma, |
| 2699 | threshold; |
| 2700 | |
| 2701 | Image |
| 2702 | *images, |
| 2703 | *montage_image, |
| 2704 | *preview_image, |
| 2705 | *thumbnail; |
| 2706 | |
| 2707 | ImageInfo |
| 2708 | *preview_info; |
| 2709 | |
| 2710 | long |
| 2711 | y; |
| 2712 | |
| 2713 | MagickBooleanType |
| 2714 | proceed; |
| 2715 | |
| 2716 | MontageInfo |
| 2717 | *montage_info; |
| 2718 | |
| 2719 | QuantizeInfo |
| 2720 | quantize_info; |
| 2721 | |
| 2722 | RectangleInfo |
| 2723 | geometry; |
| 2724 | |
| 2725 | register long |
| 2726 | i, |
| 2727 | x; |
| 2728 | |
| 2729 | unsigned long |
| 2730 | colors; |
| 2731 | |
| 2732 | /* |
| 2733 | Open output image file. |
| 2734 | */ |
| 2735 | assert(image != (Image *) NULL); |
| 2736 | assert(image->signature == MagickSignature); |
| 2737 | if (image->debug != MagickFalse) |
| 2738 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 2739 | colors=2; |
| 2740 | degrees=0.0; |
| 2741 | gamma=(-0.2f); |
| 2742 | preview_info=AcquireImageInfo(); |
| 2743 | SetGeometry(image,&geometry); |
| 2744 | (void) ParseMetaGeometry(DefaultPreviewGeometry,&geometry.x,&geometry.y, |
| 2745 | &geometry.width,&geometry.height); |
| 2746 | images=NewImageList(); |
| 2747 | percentage=12.5; |
| 2748 | GetQuantizeInfo(&quantize_info); |
| 2749 | radius=0.0; |
| 2750 | sigma=1.0; |
| 2751 | threshold=0.0; |
| 2752 | x=0; |
| 2753 | y=0; |
| 2754 | for (i=0; i < NumberTiles; i++) |
| 2755 | { |
| 2756 | thumbnail=ThumbnailImage(image,geometry.width,geometry.height,exception); |
| 2757 | if (thumbnail == (Image *) NULL) |
| 2758 | break; |
| 2759 | (void) SetImageProgressMonitor(thumbnail,(MagickProgressMonitor) NULL, |
| 2760 | (void *) NULL); |
| 2761 | (void) SetImageProperty(thumbnail,"label",DefaultTileLabel); |
| 2762 | if (i == (NumberTiles/2)) |
| 2763 | { |
| 2764 | (void) QueryColorDatabase("#dfdfdf",&thumbnail->matte_color,exception); |
| 2765 | AppendImageToList(&images,thumbnail); |
| 2766 | continue; |
| 2767 | } |
| 2768 | switch (preview) |
| 2769 | { |
| 2770 | case RotatePreview: |
| 2771 | { |
| 2772 | degrees+=45.0; |
| 2773 | preview_image=RotateImage(thumbnail,degrees,exception); |
| 2774 | (void) FormatMagickString(label,MaxTextExtent,"rotate %g",degrees); |
| 2775 | break; |
| 2776 | } |
| 2777 | case ShearPreview: |
| 2778 | { |
| 2779 | degrees+=5.0; |
| 2780 | preview_image=ShearImage(thumbnail,degrees,degrees,exception); |
| 2781 | (void) FormatMagickString(label,MaxTextExtent,"shear %gx%g", |
| 2782 | degrees,2.0*degrees); |
| 2783 | break; |
| 2784 | } |
| 2785 | case RollPreview: |
| 2786 | { |
| 2787 | x=(long) ((i+1)*thumbnail->columns)/NumberTiles; |
| 2788 | y=(long) ((i+1)*thumbnail->rows)/NumberTiles; |
| 2789 | preview_image=RollImage(thumbnail,x,y,exception); |
| 2790 | (void) FormatMagickString(label,MaxTextExtent,"roll %ldx%ld",x,y); |
| 2791 | break; |
| 2792 | } |
| 2793 | case HuePreview: |
| 2794 | { |
| 2795 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 2796 | if (preview_image == (Image *) NULL) |
| 2797 | break; |
| 2798 | (void) FormatMagickString(factor,MaxTextExtent,"100,100,%g", |
| 2799 | 2.0*percentage); |
| 2800 | (void) ModulateImage(preview_image,factor); |
| 2801 | (void) FormatMagickString(label,MaxTextExtent,"modulate %s",factor); |
| 2802 | break; |
| 2803 | } |
| 2804 | case SaturationPreview: |
| 2805 | { |
| 2806 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 2807 | if (preview_image == (Image *) NULL) |
| 2808 | break; |
| 2809 | (void) FormatMagickString(factor,MaxTextExtent,"100,%g",2.0*percentage); |
| 2810 | (void) ModulateImage(preview_image,factor); |
| 2811 | (void) FormatMagickString(label,MaxTextExtent,"modulate %s",factor); |
| 2812 | break; |
| 2813 | } |
| 2814 | case BrightnessPreview: |
| 2815 | { |
| 2816 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 2817 | if (preview_image == (Image *) NULL) |
| 2818 | break; |
| 2819 | (void) FormatMagickString(factor,MaxTextExtent,"%g",2.0*percentage); |
| 2820 | (void) ModulateImage(preview_image,factor); |
| 2821 | (void) FormatMagickString(label,MaxTextExtent,"modulate %s",factor); |
| 2822 | break; |
| 2823 | } |
| 2824 | case GammaPreview: |
| 2825 | default: |
| 2826 | { |
| 2827 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 2828 | if (preview_image == (Image *) NULL) |
| 2829 | break; |
| 2830 | gamma+=0.4f; |
| 2831 | (void) GammaImageChannel(preview_image,DefaultChannels,gamma); |
| 2832 | (void) FormatMagickString(label,MaxTextExtent,"gamma %g",gamma); |
| 2833 | break; |
| 2834 | } |
| 2835 | case SpiffPreview: |
| 2836 | { |
| 2837 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 2838 | if (preview_image != (Image *) NULL) |
| 2839 | for (x=0; x < i; x++) |
| 2840 | (void) ContrastImage(preview_image,MagickTrue); |
| 2841 | (void) FormatMagickString(label,MaxTextExtent,"contrast (%ld)",i+1); |
| 2842 | break; |
| 2843 | } |
| 2844 | case DullPreview: |
| 2845 | { |
| 2846 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 2847 | if (preview_image == (Image *) NULL) |
| 2848 | break; |
| 2849 | for (x=0; x < i; x++) |
| 2850 | (void) ContrastImage(preview_image,MagickFalse); |
| 2851 | (void) FormatMagickString(label,MaxTextExtent,"+contrast (%ld)",i+1); |
| 2852 | break; |
| 2853 | } |
| 2854 | case GrayscalePreview: |
| 2855 | { |
| 2856 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 2857 | if (preview_image == (Image *) NULL) |
| 2858 | break; |
| 2859 | colors<<=1; |
| 2860 | quantize_info.number_colors=colors; |
| 2861 | quantize_info.colorspace=GRAYColorspace; |
| 2862 | (void) QuantizeImage(&quantize_info,preview_image); |
| 2863 | (void) FormatMagickString(label,MaxTextExtent, |
| 2864 | "-colorspace gray -colors %ld",colors); |
| 2865 | break; |
| 2866 | } |
| 2867 | case QuantizePreview: |
| 2868 | { |
| 2869 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 2870 | if (preview_image == (Image *) NULL) |
| 2871 | break; |
| 2872 | colors<<=1; |
| 2873 | quantize_info.number_colors=colors; |
| 2874 | (void) QuantizeImage(&quantize_info,preview_image); |
| 2875 | (void) FormatMagickString(label,MaxTextExtent,"colors %ld",colors); |
| 2876 | break; |
| 2877 | } |
| 2878 | case DespecklePreview: |
| 2879 | { |
| 2880 | for (x=0; x < (i-1); x++) |
| 2881 | { |
| 2882 | preview_image=DespeckleImage(thumbnail,exception); |
| 2883 | if (preview_image == (Image *) NULL) |
| 2884 | break; |
| 2885 | thumbnail=DestroyImage(thumbnail); |
| 2886 | thumbnail=preview_image; |
| 2887 | } |
| 2888 | preview_image=DespeckleImage(thumbnail,exception); |
| 2889 | if (preview_image == (Image *) NULL) |
| 2890 | break; |
| 2891 | (void) FormatMagickString(label,MaxTextExtent,"despeckle (%ld)",i+1); |
| 2892 | break; |
| 2893 | } |
| 2894 | case ReduceNoisePreview: |
| 2895 | { |
| 2896 | preview_image=ReduceNoiseImage(thumbnail,radius,exception); |
| 2897 | (void) FormatMagickString(label,MaxTextExtent,"noise %g",radius); |
| 2898 | break; |
| 2899 | } |
| 2900 | case AddNoisePreview: |
| 2901 | { |
| 2902 | switch ((int) i) |
| 2903 | { |
| 2904 | case 0: |
| 2905 | { |
| 2906 | (void) CopyMagickString(factor,"uniform",MaxTextExtent); |
| 2907 | break; |
| 2908 | } |
| 2909 | case 1: |
| 2910 | { |
| 2911 | (void) CopyMagickString(factor,"gaussian",MaxTextExtent); |
| 2912 | break; |
| 2913 | } |
| 2914 | case 2: |
| 2915 | { |
| 2916 | (void) CopyMagickString(factor,"multiplicative",MaxTextExtent); |
| 2917 | break; |
| 2918 | } |
| 2919 | case 3: |
| 2920 | { |
| 2921 | (void) CopyMagickString(factor,"impulse",MaxTextExtent); |
| 2922 | break; |
| 2923 | } |
| 2924 | case 4: |
| 2925 | { |
| 2926 | (void) CopyMagickString(factor,"laplacian",MaxTextExtent); |
| 2927 | break; |
| 2928 | } |
| 2929 | case 5: |
| 2930 | { |
| 2931 | (void) CopyMagickString(factor,"Poisson",MaxTextExtent); |
| 2932 | break; |
| 2933 | } |
| 2934 | default: |
| 2935 | { |
| 2936 | (void) CopyMagickString(thumbnail->magick,"NULL",MaxTextExtent); |
| 2937 | break; |
| 2938 | } |
| 2939 | } |
| 2940 | preview_image=ReduceNoiseImage(thumbnail,(double) i,exception); |
| 2941 | (void) FormatMagickString(label,MaxTextExtent,"+noise %s",factor); |
| 2942 | break; |
| 2943 | } |
| 2944 | case SharpenPreview: |
| 2945 | { |
| 2946 | preview_image=SharpenImage(thumbnail,radius,sigma,exception); |
| 2947 | (void) FormatMagickString(label,MaxTextExtent,"sharpen %gx%g",radius, |
| 2948 | sigma); |
| 2949 | break; |
| 2950 | } |
| 2951 | case BlurPreview: |
| 2952 | { |
| 2953 | preview_image=BlurImage(thumbnail,radius,sigma,exception); |
| 2954 | (void) FormatMagickString(label,MaxTextExtent,"blur %gx%g",radius, |
| 2955 | sigma); |
| 2956 | break; |
| 2957 | } |
| 2958 | case ThresholdPreview: |
| 2959 | { |
| 2960 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 2961 | if (preview_image == (Image *) NULL) |
| 2962 | break; |
| 2963 | (void) BilevelImage(thumbnail, |
| 2964 | (double) (percentage*((MagickRealType) QuantumRange+1.0))/100.0); |
| 2965 | (void) FormatMagickString(label,MaxTextExtent,"threshold %g", |
| 2966 | (double) (percentage*((MagickRealType) QuantumRange+1.0))/100.0); |
| 2967 | break; |
| 2968 | } |
| 2969 | case EdgeDetectPreview: |
| 2970 | { |
| 2971 | preview_image=EdgeImage(thumbnail,radius,exception); |
| 2972 | (void) FormatMagickString(label,MaxTextExtent,"edge %g",radius); |
| 2973 | break; |
| 2974 | } |
| 2975 | case SpreadPreview: |
| 2976 | { |
| 2977 | preview_image=SpreadImage(thumbnail,radius,exception); |
| 2978 | (void) FormatMagickString(label,MaxTextExtent,"spread %g",radius+0.5); |
| 2979 | break; |
| 2980 | } |
| 2981 | case SolarizePreview: |
| 2982 | { |
| 2983 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 2984 | if (preview_image == (Image *) NULL) |
| 2985 | break; |
| 2986 | (void) SolarizeImage(preview_image,(double) QuantumRange* |
| 2987 | percentage/100.0); |
| 2988 | (void) FormatMagickString(label,MaxTextExtent,"solarize %g", |
| 2989 | (QuantumRange*percentage)/100.0); |
| 2990 | break; |
| 2991 | } |
| 2992 | case ShadePreview: |
| 2993 | { |
| 2994 | degrees+=10.0; |
| 2995 | preview_image=ShadeImage(thumbnail,MagickTrue,degrees,degrees, |
| 2996 | exception); |
| 2997 | (void) FormatMagickString(label,MaxTextExtent,"shade %gx%g",degrees, |
| 2998 | degrees); |
| 2999 | break; |
| 3000 | } |
| 3001 | case RaisePreview: |
| 3002 | { |
| 3003 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 3004 | if (preview_image == (Image *) NULL) |
| 3005 | break; |
| 3006 | geometry.width=(unsigned long) (2*i+2); |
| 3007 | geometry.height=(unsigned long) (2*i+2); |
| 3008 | geometry.x=i/2; |
| 3009 | geometry.y=i/2; |
| 3010 | (void) RaiseImage(preview_image,&geometry,MagickTrue); |
| 3011 | (void) FormatMagickString(label,MaxTextExtent,"raise %lux%lu%+ld%+ld", |
| 3012 | geometry.width,geometry.height,geometry.x,geometry.y); |
| 3013 | break; |
| 3014 | } |
| 3015 | case SegmentPreview: |
| 3016 | { |
| 3017 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 3018 | if (preview_image == (Image *) NULL) |
| 3019 | break; |
| 3020 | threshold+=0.4f; |
| 3021 | (void) SegmentImage(preview_image,RGBColorspace,MagickFalse,threshold, |
| 3022 | threshold); |
| 3023 | (void) FormatMagickString(label,MaxTextExtent,"segment %gx%g", |
| 3024 | threshold,threshold); |
| 3025 | break; |
| 3026 | } |
| 3027 | case SwirlPreview: |
| 3028 | { |
| 3029 | preview_image=SwirlImage(thumbnail,degrees,exception); |
| 3030 | (void) FormatMagickString(label,MaxTextExtent,"swirl %g",degrees); |
| 3031 | degrees+=45.0; |
| 3032 | break; |
| 3033 | } |
| 3034 | case ImplodePreview: |
| 3035 | { |
| 3036 | degrees+=0.1f; |
| 3037 | preview_image=ImplodeImage(thumbnail,degrees,exception); |
| 3038 | (void) FormatMagickString(label,MaxTextExtent,"implode %g",degrees); |
| 3039 | break; |
| 3040 | } |
| 3041 | case WavePreview: |
| 3042 | { |
| 3043 | degrees+=5.0f; |
| 3044 | preview_image=WaveImage(thumbnail,0.5*degrees,2.0*degrees,exception); |
| 3045 | (void) FormatMagickString(label,MaxTextExtent,"wave %gx%g",0.5*degrees, |
| 3046 | 2.0*degrees); |
| 3047 | break; |
| 3048 | } |
| 3049 | case OilPaintPreview: |
| 3050 | { |
| 3051 | preview_image=OilPaintImage(thumbnail,(double) radius,exception); |
| 3052 | (void) FormatMagickString(label,MaxTextExtent,"paint %g",radius); |
| 3053 | break; |
| 3054 | } |
| 3055 | case CharcoalDrawingPreview: |
| 3056 | { |
| 3057 | preview_image=CharcoalImage(thumbnail,(double) radius,(double) sigma, |
| 3058 | exception); |
| 3059 | (void) FormatMagickString(label,MaxTextExtent,"charcoal %gx%g",radius, |
| 3060 | sigma); |
| 3061 | break; |
| 3062 | } |
| 3063 | case JPEGPreview: |
| 3064 | { |
| 3065 | char |
| 3066 | filename[MaxTextExtent]; |
| 3067 | |
| 3068 | int |
| 3069 | file; |
| 3070 | |
| 3071 | MagickBooleanType |
| 3072 | status; |
| 3073 | |
| 3074 | preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception); |
| 3075 | if (preview_image == (Image *) NULL) |
| 3076 | break; |
| 3077 | preview_info->quality=(unsigned long) percentage; |
| 3078 | (void) FormatMagickString(factor,MaxTextExtent,"%lu", |
| 3079 | preview_info->quality); |
| 3080 | file=AcquireUniqueFileResource(filename); |
| 3081 | if (file != -1) |
| 3082 | file=close(file)-1; |
| 3083 | (void) FormatMagickString(preview_image->filename,MaxTextExtent, |
| 3084 | "jpeg:%s",filename); |
| 3085 | status=WriteImage(preview_info,preview_image); |
| 3086 | if (status != MagickFalse) |
| 3087 | { |
| 3088 | Image |
| 3089 | *quality_image; |
| 3090 | |
| 3091 | (void) CopyMagickString(preview_info->filename, |
| 3092 | preview_image->filename,MaxTextExtent); |
| 3093 | quality_image=ReadImage(preview_info,exception); |
| 3094 | if (quality_image != (Image *) NULL) |
| 3095 | { |
| 3096 | preview_image=DestroyImage(preview_image); |
| 3097 | preview_image=quality_image; |
| 3098 | } |
| 3099 | } |
| 3100 | (void) RelinquishUniqueFileResource(preview_image->filename); |
| 3101 | if ((GetBlobSize(preview_image)/1024) >= 1024) |
| 3102 | (void) FormatMagickString(label,MaxTextExtent,"quality %s\n%gmb ", |
| 3103 | factor,(double) ((MagickOffsetType) GetBlobSize(preview_image))/ |
| 3104 | 1024.0/1024.0); |
| 3105 | else |
| 3106 | if (GetBlobSize(preview_image) >= 1024) |
| 3107 | (void) FormatMagickString(label,MaxTextExtent,"quality %s\n%gkb ", |
| 3108 | factor,(double) ((MagickOffsetType) GetBlobSize(preview_image))/ |
| 3109 | 1024.0); |
| 3110 | else |
| 3111 | (void) FormatMagickString(label,MaxTextExtent,"quality %s\n%lub ", |
| 3112 | factor,(unsigned long) GetBlobSize(thumbnail)); |
| 3113 | break; |
| 3114 | } |
| 3115 | } |
| 3116 | thumbnail=DestroyImage(thumbnail); |
| 3117 | percentage+=12.5; |
| 3118 | radius+=0.5; |
| 3119 | sigma+=0.25; |
| 3120 | if (preview_image == (Image *) NULL) |
| 3121 | break; |
| 3122 | (void) DeleteImageProperty(preview_image,"label"); |
| 3123 | (void) SetImageProperty(preview_image,"label",label); |
| 3124 | AppendImageToList(&images,preview_image); |
| 3125 | proceed=SetImageProgress(image,PreviewImageTag,i,NumberTiles); |
| 3126 | if (proceed == MagickFalse) |
| 3127 | break; |
| 3128 | } |
| 3129 | if (images == (Image *) NULL) |
| 3130 | { |
| 3131 | preview_info=DestroyImageInfo(preview_info); |
| 3132 | return((Image *) NULL); |
| 3133 | } |
| 3134 | /* |
| 3135 | Create the montage. |
| 3136 | */ |
| 3137 | montage_info=CloneMontageInfo(preview_info,(MontageInfo *) NULL); |
| 3138 | (void) CopyMagickString(montage_info->filename,image->filename,MaxTextExtent); |
| 3139 | montage_info->shadow=MagickTrue; |
| 3140 | (void) CloneString(&montage_info->tile,"3x3"); |
| 3141 | (void) CloneString(&montage_info->geometry,DefaultPreviewGeometry); |
| 3142 | (void) CloneString(&montage_info->frame,DefaultTileFrame); |
| 3143 | montage_image=MontageImages(images,montage_info,exception); |
| 3144 | montage_info=DestroyMontageInfo(montage_info); |
| 3145 | images=DestroyImageList(images); |
| 3146 | if (montage_image == (Image *) NULL) |
| 3147 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 3148 | if (montage_image->montage != (char *) NULL) |
| 3149 | { |
| 3150 | /* |
| 3151 | Free image directory. |
| 3152 | */ |
| 3153 | montage_image->montage=(char *) RelinquishMagickMemory( |
| 3154 | montage_image->montage); |
| 3155 | if (image->directory != (char *) NULL) |
| 3156 | montage_image->directory=(char *) RelinquishMagickMemory( |
| 3157 | montage_image->directory); |
| 3158 | } |
| 3159 | preview_info=DestroyImageInfo(preview_info); |
| 3160 | return(montage_image); |
| 3161 | } |
| 3162 | |
| 3163 | /* |
| 3164 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 3165 | % % |
| 3166 | % % |
| 3167 | % % |
| 3168 | % R a d i a l B l u r I m a g e % |
| 3169 | % % |
| 3170 | % % |
| 3171 | % % |
| 3172 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 3173 | % |
| 3174 | % RadialBlurImage() applies a radial blur to the image. |
| 3175 | % |
| 3176 | % Andrew Protano contributed this effect. |
| 3177 | % |
| 3178 | % The format of the RadialBlurImage method is: |
| 3179 | % |
| 3180 | % Image *RadialBlurImage(const Image *image,const double angle, |
| 3181 | % ExceptionInfo *exception) |
| 3182 | % Image *RadialBlurImageChannel(const Image *image,const ChannelType channel, |
| 3183 | % const double angle,ExceptionInfo *exception) |
| 3184 | % |
| 3185 | % A description of each parameter follows: |
| 3186 | % |
| 3187 | % o image: the image. |
| 3188 | % |
| 3189 | % o channel: the channel type. |
| 3190 | % |
| 3191 | % o angle: the angle of the radial blur. |
| 3192 | % |
| 3193 | % o exception: return any errors or warnings in this structure. |
| 3194 | % |
| 3195 | */ |
| 3196 | |
| 3197 | MagickExport Image *RadialBlurImage(const Image *image,const double angle, |
| 3198 | ExceptionInfo *exception) |
| 3199 | { |
| 3200 | Image |
| 3201 | *blur_image; |
| 3202 | |
| 3203 | blur_image=RadialBlurImageChannel(image,DefaultChannels,angle,exception); |
| 3204 | return(blur_image); |
| 3205 | } |
| 3206 | |
| 3207 | MagickExport Image *RadialBlurImageChannel(const Image *image, |
| 3208 | const ChannelType channel,const double angle,ExceptionInfo *exception) |
| 3209 | { |
| 3210 | Image |
| 3211 | *blur_image; |
| 3212 | |
| 3213 | long |
| 3214 | progress, |
| 3215 | y; |
| 3216 | |
| 3217 | MagickBooleanType |
| 3218 | status; |
| 3219 | |
| 3220 | MagickPixelPacket |
| 3221 | zero; |
| 3222 | |
| 3223 | MagickRealType |
| 3224 | blur_radius, |
| 3225 | *cos_theta, |
| 3226 | offset, |
| 3227 | *sin_theta, |
| 3228 | theta; |
| 3229 | |
| 3230 | PointInfo |
| 3231 | blur_center; |
| 3232 | |
| 3233 | register long |
| 3234 | i; |
| 3235 | |
| 3236 | unsigned long |
| 3237 | n; |
| 3238 | |
| 3239 | CacheView |
| 3240 | *blur_view, |
| 3241 | *image_view; |
| 3242 | |
| 3243 | /* |
| 3244 | Allocate blur image. |
| 3245 | */ |
| 3246 | assert(image != (Image *) NULL); |
| 3247 | assert(image->signature == MagickSignature); |
| 3248 | if (image->debug != MagickFalse) |
| 3249 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 3250 | assert(exception != (ExceptionInfo *) NULL); |
| 3251 | assert(exception->signature == MagickSignature); |
| 3252 | blur_image=CloneImage(image,0,0,MagickTrue,exception); |
| 3253 | if (blur_image == (Image *) NULL) |
| 3254 | return((Image *) NULL); |
| 3255 | if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse) |
| 3256 | { |
| 3257 | InheritException(exception,&blur_image->exception); |
| 3258 | blur_image=DestroyImage(blur_image); |
| 3259 | return((Image *) NULL); |
| 3260 | } |
| 3261 | blur_center.x=(double) image->columns/2.0; |
| 3262 | blur_center.y=(double) image->rows/2.0; |
| 3263 | blur_radius=hypot(blur_center.x,blur_center.y); |
| 3264 | n=(unsigned long) fabs(4.0*DegreesToRadians(angle)*sqrt((double) blur_radius)+ |
| 3265 | 2UL); |
| 3266 | theta=DegreesToRadians(angle)/(MagickRealType) (n-1); |
| 3267 | cos_theta=(MagickRealType *) AcquireQuantumMemory((size_t) n, |
| 3268 | sizeof(*cos_theta)); |
| 3269 | sin_theta=(MagickRealType *) AcquireQuantumMemory((size_t) n, |
| 3270 | sizeof(*sin_theta)); |
| 3271 | if ((cos_theta == (MagickRealType *) NULL) || |
| 3272 | (sin_theta == (MagickRealType *) NULL)) |
| 3273 | { |
| 3274 | blur_image=DestroyImage(blur_image); |
| 3275 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 3276 | } |
| 3277 | offset=theta*(MagickRealType) (n-1)/2.0; |
| 3278 | for (i=0; i < (long) n; i++) |
| 3279 | { |
| 3280 | cos_theta[i]=cos((double) (theta*i-offset)); |
| 3281 | sin_theta[i]=sin((double) (theta*i-offset)); |
| 3282 | } |
| 3283 | /* |
| 3284 | Radial blur image. |
| 3285 | */ |
| 3286 | status=MagickTrue; |
| 3287 | progress=0; |
| 3288 | GetMagickPixelPacket(image,&zero); |
| 3289 | image_view=AcquireCacheView(image); |
| 3290 | blur_view=AcquireCacheView(blur_image); |
| 3291 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 3292 | #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| 3293 | #endif |
| 3294 | for (y=0; y < (long) blur_image->rows; y++) |
| 3295 | { |
| 3296 | register const IndexPacket |
| 3297 | *__restrict indexes; |
| 3298 | |
| 3299 | register IndexPacket |
| 3300 | *__restrict blur_indexes; |
| 3301 | |
| 3302 | register long |
| 3303 | x; |
| 3304 | |
| 3305 | register PixelPacket |
| 3306 | *__restrict q; |
| 3307 | |
| 3308 | if (status == MagickFalse) |
| 3309 | continue; |
| 3310 | q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1, |
| 3311 | exception); |
| 3312 | if (q == (PixelPacket *) NULL) |
| 3313 | { |
| 3314 | status=MagickFalse; |
| 3315 | continue; |
| 3316 | } |
| 3317 | blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view); |
| 3318 | for (x=0; x < (long) blur_image->columns; x++) |
| 3319 | { |
| 3320 | MagickPixelPacket |
| 3321 | qixel; |
| 3322 | |
| 3323 | MagickRealType |
| 3324 | normalize, |
| 3325 | radius; |
| 3326 | |
| 3327 | PixelPacket |
| 3328 | pixel; |
| 3329 | |
| 3330 | PointInfo |
| 3331 | center; |
| 3332 | |
| 3333 | register long |
| 3334 | i; |
| 3335 | |
| 3336 | unsigned long |
| 3337 | step; |
| 3338 | |
| 3339 | center.x=(double) x-blur_center.x; |
| 3340 | center.y=(double) y-blur_center.y; |
| 3341 | radius=hypot((double) center.x,center.y); |
| 3342 | if (radius == 0) |
| 3343 | step=1; |
| 3344 | else |
| 3345 | { |
| 3346 | step=(unsigned long) (blur_radius/radius); |
| 3347 | if (step == 0) |
| 3348 | step=1; |
| 3349 | else |
| 3350 | if (step >= n) |
| 3351 | step=n-1; |
| 3352 | } |
| 3353 | normalize=0.0; |
| 3354 | qixel=zero; |
| 3355 | if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse)) |
| 3356 | { |
| 3357 | for (i=0; i < (long) n; i+=step) |
| 3358 | { |
| 3359 | (void) GetOneCacheViewVirtualPixel(image_view,(long) (blur_center.x+ |
| 3360 | center.x*cos_theta[i]-center.y*sin_theta[i]+0.5),(long) ( |
| 3361 | blur_center.y+center.x*sin_theta[i]+center.y*cos_theta[i]+0.5), |
| 3362 | &pixel,exception); |
| 3363 | qixel.red+=pixel.red; |
| 3364 | qixel.green+=pixel.green; |
| 3365 | qixel.blue+=pixel.blue; |
| 3366 | qixel.opacity+=pixel.opacity; |
| 3367 | if (image->colorspace == CMYKColorspace) |
| 3368 | { |
| 3369 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 3370 | qixel.index+=(*indexes); |
| 3371 | } |
| 3372 | normalize+=1.0; |
| 3373 | } |
| 3374 | normalize=1.0/(fabs((double) normalize) <= MagickEpsilon ? 1.0 : |
| 3375 | normalize); |
| 3376 | if ((channel & RedChannel) != 0) |
| 3377 | q->red=RoundToQuantum(normalize*qixel.red); |
| 3378 | if ((channel & GreenChannel) != 0) |
| 3379 | q->green=RoundToQuantum(normalize*qixel.green); |
| 3380 | if ((channel & BlueChannel) != 0) |
| 3381 | q->blue=RoundToQuantum(normalize*qixel.blue); |
| 3382 | if ((channel & OpacityChannel) != 0) |
| 3383 | q->opacity=RoundToQuantum(normalize*qixel.opacity); |
| 3384 | if (((channel & IndexChannel) != 0) && |
| 3385 | (image->colorspace == CMYKColorspace)) |
| 3386 | blur_indexes[x]=(IndexPacket) RoundToQuantum(normalize*qixel.index); |
| 3387 | } |
| 3388 | else |
| 3389 | { |
| 3390 | MagickRealType |
| 3391 | alpha, |
| 3392 | gamma; |
| 3393 | |
| 3394 | alpha=1.0; |
| 3395 | gamma=0.0; |
| 3396 | for (i=0; i < (long) n; i+=step) |
| 3397 | { |
| 3398 | (void) GetOneCacheViewVirtualPixel(image_view,(long) (blur_center.x+ |
| 3399 | center.x*cos_theta[i]-center.y*sin_theta[i]+0.5),(long) ( |
| 3400 | blur_center.y+center.x*sin_theta[i]+center.y*cos_theta[i]+0.5), |
| 3401 | &pixel,exception); |
| 3402 | alpha=(MagickRealType) (QuantumScale*(QuantumRange-pixel.opacity)); |
| 3403 | qixel.red+=alpha*pixel.red; |
| 3404 | qixel.green+=alpha*pixel.green; |
| 3405 | qixel.blue+=alpha*pixel.blue; |
| 3406 | qixel.opacity+=pixel.opacity; |
| 3407 | if (image->colorspace == CMYKColorspace) |
| 3408 | { |
| 3409 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 3410 | qixel.index+=alpha*(*indexes); |
| 3411 | } |
| 3412 | gamma+=alpha; |
| 3413 | normalize+=1.0; |
| 3414 | } |
| 3415 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma); |
| 3416 | normalize=1.0/(fabs((double) normalize) <= MagickEpsilon ? 1.0 : |
| 3417 | normalize); |
| 3418 | if ((channel & RedChannel) != 0) |
| 3419 | q->red=RoundToQuantum(gamma*qixel.red); |
| 3420 | if ((channel & GreenChannel) != 0) |
| 3421 | q->green=RoundToQuantum(gamma*qixel.green); |
| 3422 | if ((channel & BlueChannel) != 0) |
| 3423 | q->blue=RoundToQuantum(gamma*qixel.blue); |
| 3424 | if ((channel & OpacityChannel) != 0) |
| 3425 | q->opacity=RoundToQuantum(normalize*qixel.opacity); |
| 3426 | if (((channel & IndexChannel) != 0) && |
| 3427 | (image->colorspace == CMYKColorspace)) |
| 3428 | blur_indexes[x]=(IndexPacket) RoundToQuantum(gamma*qixel.index); |
| 3429 | } |
| 3430 | q++; |
| 3431 | } |
| 3432 | if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse) |
| 3433 | status=MagickFalse; |
| 3434 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 3435 | { |
| 3436 | MagickBooleanType |
| 3437 | proceed; |
| 3438 | |
| 3439 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 3440 | #pragma omp critical (MagickCore_RadialBlurImageChannel) |
| 3441 | #endif |
| 3442 | proceed=SetImageProgress(image,BlurImageTag,progress++,image->rows); |
| 3443 | if (proceed == MagickFalse) |
| 3444 | status=MagickFalse; |
| 3445 | } |
| 3446 | } |
| 3447 | blur_view=DestroyCacheView(blur_view); |
| 3448 | image_view=DestroyCacheView(image_view); |
| 3449 | cos_theta=(MagickRealType *) RelinquishMagickMemory(cos_theta); |
| 3450 | sin_theta=(MagickRealType *) RelinquishMagickMemory(sin_theta); |
| 3451 | if (status == MagickFalse) |
| 3452 | blur_image=DestroyImage(blur_image); |
| 3453 | return(blur_image); |
| 3454 | } |
| 3455 | |
| 3456 | /* |
| 3457 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 3458 | % % |
| 3459 | % % |
| 3460 | % % |
| 3461 | % R e d u c e N o i s e I m a g e % |
| 3462 | % % |
| 3463 | % % |
| 3464 | % % |
| 3465 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 3466 | % |
| 3467 | % ReduceNoiseImage() smooths the contours of an image while still preserving |
| 3468 | % edge information. The algorithm works by replacing each pixel with its |
| 3469 | % neighbor closest in value. A neighbor is defined by radius. Use a radius |
| 3470 | % of 0 and ReduceNoise() selects a suitable radius for you. |
| 3471 | % |
| 3472 | % The format of the ReduceNoiseImage method is: |
| 3473 | % |
| 3474 | % Image *ReduceNoiseImage(const Image *image,const double radius, |
| 3475 | % ExceptionInfo *exception) |
| 3476 | % |
| 3477 | % A description of each parameter follows: |
| 3478 | % |
| 3479 | % o image: the image. |
| 3480 | % |
| 3481 | % o radius: the radius of the pixel neighborhood. |
| 3482 | % |
| 3483 | % o exception: return any errors or warnings in this structure. |
| 3484 | % |
| 3485 | */ |
| 3486 | |
| 3487 | static MagickPixelPacket GetNonpeakMedianPixelList(MedianPixelList *pixel_list) |
| 3488 | { |
| 3489 | MagickPixelPacket |
| 3490 | pixel; |
| 3491 | |
| 3492 | register long |
| 3493 | channel; |
| 3494 | |
| 3495 | register MedianSkipList |
| 3496 | *list; |
| 3497 | |
| 3498 | unsigned long |
| 3499 | center, |
| 3500 | color, |
| 3501 | count, |
| 3502 | previous, |
| 3503 | next; |
| 3504 | |
| 3505 | unsigned short |
| 3506 | channels[5]; |
| 3507 | |
| 3508 | /* |
| 3509 | Finds the median value for each of the color. |
| 3510 | */ |
| 3511 | center=pixel_list->center; |
| 3512 | for (channel=0; channel < 5; channel++) |
| 3513 | { |
| 3514 | list=pixel_list->lists+channel; |
| 3515 | color=65536UL; |
| 3516 | next=list->nodes[color].next[0]; |
| 3517 | count=0; |
| 3518 | do |
| 3519 | { |
| 3520 | previous=color; |
| 3521 | color=next; |
| 3522 | next=list->nodes[color].next[0]; |
| 3523 | count+=list->nodes[color].count; |
| 3524 | } |
| 3525 | while (count <= center); |
| 3526 | if ((previous == 65536UL) && (next != 65536UL)) |
| 3527 | color=next; |
| 3528 | else |
| 3529 | if ((previous != 65536UL) && (next == 65536UL)) |
| 3530 | color=previous; |
| 3531 | channels[channel]=(unsigned short) color; |
| 3532 | } |
| 3533 | GetMagickPixelPacket((const Image *) NULL,&pixel); |
| 3534 | pixel.red=(MagickRealType) ScaleShortToQuantum(channels[0]); |
| 3535 | pixel.green=(MagickRealType) ScaleShortToQuantum(channels[1]); |
| 3536 | pixel.blue=(MagickRealType) ScaleShortToQuantum(channels[2]); |
| 3537 | pixel.opacity=(MagickRealType) ScaleShortToQuantum(channels[3]); |
| 3538 | pixel.index=(MagickRealType) ScaleShortToQuantum(channels[4]); |
| 3539 | return(pixel); |
| 3540 | } |
| 3541 | |
| 3542 | MagickExport Image *ReduceNoiseImage(const Image *image,const double radius, |
| 3543 | ExceptionInfo *exception) |
| 3544 | { |
| 3545 | #define ReduceNoiseImageTag "ReduceNoise/Image" |
| 3546 | |
| 3547 | Image |
| 3548 | *noise_image; |
| 3549 | |
| 3550 | long |
| 3551 | progress, |
| 3552 | y; |
| 3553 | |
| 3554 | MagickBooleanType |
| 3555 | status; |
| 3556 | |
| 3557 | MedianPixelList |
| 3558 | **pixel_list; |
| 3559 | |
| 3560 | unsigned long |
| 3561 | width; |
| 3562 | |
| 3563 | CacheView |
| 3564 | *image_view, |
| 3565 | *noise_view; |
| 3566 | |
| 3567 | /* |
| 3568 | Initialize noise image attributes. |
| 3569 | */ |
| 3570 | assert(image != (Image *) NULL); |
| 3571 | assert(image->signature == MagickSignature); |
| 3572 | if (image->debug != MagickFalse) |
| 3573 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 3574 | assert(exception != (ExceptionInfo *) NULL); |
| 3575 | assert(exception->signature == MagickSignature); |
| 3576 | width=GetOptimalKernelWidth2D(radius,0.5); |
| 3577 | if ((image->columns < width) || (image->rows < width)) |
| 3578 | ThrowImageException(OptionError,"ImageSmallerThanKernelRadius"); |
| 3579 | noise_image=CloneImage(image,image->columns,image->rows,MagickTrue, |
| 3580 | exception); |
| 3581 | if (noise_image == (Image *) NULL) |
| 3582 | return((Image *) NULL); |
| 3583 | if (SetImageStorageClass(noise_image,DirectClass) == MagickFalse) |
| 3584 | { |
| 3585 | InheritException(exception,&noise_image->exception); |
| 3586 | noise_image=DestroyImage(noise_image); |
| 3587 | return((Image *) NULL); |
| 3588 | } |
| 3589 | pixel_list=AcquireMedianPixelListThreadSet(width); |
| 3590 | if (pixel_list == (MedianPixelList **) NULL) |
| 3591 | { |
| 3592 | noise_image=DestroyImage(noise_image); |
| 3593 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 3594 | } |
| 3595 | /* |
| 3596 | Reduce noise image. |
| 3597 | */ |
| 3598 | status=MagickTrue; |
| 3599 | progress=0; |
| 3600 | image_view=AcquireCacheView(image); |
| 3601 | noise_view=AcquireCacheView(noise_image); |
| 3602 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 3603 | #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| 3604 | #endif |
| 3605 | for (y=0; y < (long) noise_image->rows; y++) |
| 3606 | { |
| 3607 | register const IndexPacket |
| 3608 | *__restrict indexes; |
| 3609 | |
| 3610 | register const PixelPacket |
| 3611 | *__restrict p; |
| 3612 | |
| 3613 | register IndexPacket |
| 3614 | *__restrict noise_indexes; |
| 3615 | |
| 3616 | register long |
| 3617 | id, |
| 3618 | x; |
| 3619 | |
| 3620 | register PixelPacket |
| 3621 | *__restrict q; |
| 3622 | |
| 3623 | if (status == MagickFalse) |
| 3624 | continue; |
| 3625 | p=GetCacheViewVirtualPixels(image_view,-((long) width/2L),y-(long) (width/ |
| 3626 | 2L),image->columns+width,width,exception); |
| 3627 | q=QueueCacheViewAuthenticPixels(noise_view,0,y,noise_image->columns,1, |
| 3628 | exception); |
| 3629 | if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL)) |
| 3630 | { |
| 3631 | status=MagickFalse; |
| 3632 | continue; |
| 3633 | } |
| 3634 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 3635 | noise_indexes=GetCacheViewAuthenticIndexQueue(noise_view); |
| 3636 | id=GetOpenMPThreadId(); |
| 3637 | for (x=0; x < (long) noise_image->columns; x++) |
| 3638 | { |
| 3639 | MagickPixelPacket |
| 3640 | pixel; |
| 3641 | |
| 3642 | register const PixelPacket |
| 3643 | *__restrict r; |
| 3644 | |
| 3645 | register const IndexPacket |
| 3646 | *__restrict s; |
| 3647 | |
| 3648 | register long |
| 3649 | u, |
| 3650 | v; |
| 3651 | |
| 3652 | r=p; |
| 3653 | s=indexes+x; |
| 3654 | ResetMedianPixelList(pixel_list[id]); |
| 3655 | for (v=0; v < (long) width; v++) |
| 3656 | { |
| 3657 | for (u=0; u < (long) width; u++) |
| 3658 | InsertMedianPixelList(image,r+u,s+u,pixel_list[id]); |
| 3659 | r+=image->columns+width; |
| 3660 | s+=image->columns+width; |
| 3661 | } |
| 3662 | pixel=GetNonpeakMedianPixelList(pixel_list[id]); |
| 3663 | SetPixelPacket(noise_image,&pixel,q,noise_indexes+x); |
| 3664 | p++; |
| 3665 | q++; |
| 3666 | } |
| 3667 | if (SyncCacheViewAuthenticPixels(noise_view,exception) == MagickFalse) |
| 3668 | status=MagickFalse; |
| 3669 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 3670 | { |
| 3671 | MagickBooleanType |
| 3672 | proceed; |
| 3673 | |
| 3674 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 3675 | #pragma omp critical (MagickCore_ReduceNoiseImage) |
| 3676 | #endif |
| 3677 | proceed=SetImageProgress(image,ReduceNoiseImageTag,progress++, |
| 3678 | image->rows); |
| 3679 | if (proceed == MagickFalse) |
| 3680 | status=MagickFalse; |
| 3681 | } |
| 3682 | } |
| 3683 | noise_view=DestroyCacheView(noise_view); |
| 3684 | image_view=DestroyCacheView(image_view); |
| 3685 | pixel_list=DestroyMedianPixelListThreadSet(pixel_list); |
| 3686 | return(noise_image); |
| 3687 | } |
| 3688 | |
| 3689 | /* |
| 3690 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 3691 | % % |
| 3692 | % % |
| 3693 | % % |
| 3694 | % S e l e c t i v e B l u r I m a g e % |
| 3695 | % % |
| 3696 | % % |
| 3697 | % % |
| 3698 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 3699 | % |
| 3700 | % SelectiveBlurImage() selectively blur pixels within a contrast threshold. |
| 3701 | % It is similar to the unsharpen mask that sharpens everything with contrast |
| 3702 | % above a certain threshold. |
| 3703 | % |
| 3704 | % The format of the SelectiveBlurImage method is: |
| 3705 | % |
| 3706 | % Image *SelectiveBlurImage(const Image *image,const double radius, |
| 3707 | % const double sigma,const double threshold,ExceptionInfo *exception) |
| 3708 | % Image *SelectiveBlurImageChannel(const Image *image, |
| 3709 | % const ChannelType channel,const double radius,const double sigma, |
| 3710 | % const double threshold,ExceptionInfo *exception) |
| 3711 | % |
| 3712 | % A description of each parameter follows: |
| 3713 | % |
| 3714 | % o image: the image. |
| 3715 | % |
| 3716 | % o channel: the channel type. |
| 3717 | % |
| 3718 | % o radius: the radius of the Gaussian, in pixels, not counting the center |
| 3719 | % pixel. |
| 3720 | % |
| 3721 | % o sigma: the standard deviation of the Gaussian, in pixels. |
| 3722 | % |
| 3723 | % o threshold: only pixels within this contrast threshold are included |
| 3724 | % in the blur operation. |
| 3725 | % |
| 3726 | % o exception: return any errors or warnings in this structure. |
| 3727 | % |
| 3728 | */ |
| 3729 | |
| 3730 | static inline MagickBooleanType SelectiveContrast(const PixelPacket *p, |
| 3731 | const PixelPacket *q,const double threshold) |
| 3732 | { |
| 3733 | if (fabs(PixelIntensity(p)-PixelIntensity(q)) < threshold) |
| 3734 | return(MagickTrue); |
| 3735 | return(MagickFalse); |
| 3736 | } |
| 3737 | |
| 3738 | MagickExport Image *SelectiveBlurImage(const Image *image,const double radius, |
| 3739 | const double sigma,const double threshold,ExceptionInfo *exception) |
| 3740 | { |
| 3741 | Image |
| 3742 | *blur_image; |
| 3743 | |
| 3744 | blur_image=SelectiveBlurImageChannel(image,DefaultChannels,radius,sigma, |
| 3745 | threshold,exception); |
| 3746 | return(blur_image); |
| 3747 | } |
| 3748 | |
| 3749 | MagickExport Image *SelectiveBlurImageChannel(const Image *image, |
| 3750 | const ChannelType channel,const double radius,const double sigma, |
| 3751 | const double threshold,ExceptionInfo *exception) |
| 3752 | { |
| 3753 | #define SelectiveBlurImageTag "SelectiveBlur/Image" |
| 3754 | |
| 3755 | double |
| 3756 | alpha, |
| 3757 | *kernel; |
| 3758 | |
| 3759 | Image |
| 3760 | *blur_image; |
| 3761 | |
| 3762 | long |
| 3763 | progress, |
| 3764 | v, |
| 3765 | y; |
| 3766 | |
| 3767 | MagickBooleanType |
| 3768 | status; |
| 3769 | |
| 3770 | MagickPixelPacket |
| 3771 | zero; |
| 3772 | |
| 3773 | MagickRealType |
| 3774 | bias; |
| 3775 | |
| 3776 | register long |
| 3777 | i, |
| 3778 | u; |
| 3779 | |
| 3780 | unsigned long |
| 3781 | width; |
| 3782 | |
| 3783 | CacheView |
| 3784 | *blur_view, |
| 3785 | *image_view; |
| 3786 | |
| 3787 | /* |
| 3788 | Initialize blur image attributes. |
| 3789 | */ |
| 3790 | assert(image != (Image *) NULL); |
| 3791 | assert(image->signature == MagickSignature); |
| 3792 | if (image->debug != MagickFalse) |
| 3793 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 3794 | assert(exception != (ExceptionInfo *) NULL); |
| 3795 | assert(exception->signature == MagickSignature); |
| 3796 | width=GetOptimalKernelWidth1D(radius,sigma); |
| 3797 | kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel)); |
| 3798 | if (kernel == (double *) NULL) |
| 3799 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 3800 | i=0; |
| 3801 | for (v=(-((long) width/2)); v <= (long) (width/2); v++) |
| 3802 | { |
| 3803 | for (u=(-((long) width/2)); u <= (long) (width/2); u++) |
| 3804 | { |
| 3805 | alpha=exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma)); |
| 3806 | kernel[i]=(double) (alpha/(2.0*MagickPI*MagickSigma*MagickSigma)); |
| 3807 | i++; |
| 3808 | } |
| 3809 | } |
| 3810 | if (image->debug != MagickFalse) |
| 3811 | { |
| 3812 | char |
| 3813 | format[MaxTextExtent], |
| 3814 | *message; |
| 3815 | |
| 3816 | long |
| 3817 | u, |
| 3818 | v; |
| 3819 | |
| 3820 | register const double |
| 3821 | *k; |
| 3822 | |
| 3823 | (void) LogMagickEvent(TransformEvent,GetMagickModule(), |
| 3824 | " SelectiveBlurImage with %ldx%ld kernel:",width,width); |
| 3825 | message=AcquireString(""); |
| 3826 | k=kernel; |
| 3827 | for (v=0; v < (long) width; v++) |
| 3828 | { |
| 3829 | *message='\0'; |
| 3830 | (void) FormatMagickString(format,MaxTextExtent,"%ld: ",v); |
| 3831 | (void) ConcatenateString(&message,format); |
| 3832 | for (u=0; u < (long) width; u++) |
| 3833 | { |
| 3834 | (void) FormatMagickString(format,MaxTextExtent,"%+f ",*k++); |
| 3835 | (void) ConcatenateString(&message,format); |
| 3836 | } |
| 3837 | (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message); |
| 3838 | } |
| 3839 | message=DestroyString(message); |
| 3840 | } |
| 3841 | blur_image=CloneImage(image,0,0,MagickTrue,exception); |
| 3842 | if (blur_image == (Image *) NULL) |
| 3843 | return((Image *) NULL); |
| 3844 | if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse) |
| 3845 | { |
| 3846 | InheritException(exception,&blur_image->exception); |
| 3847 | blur_image=DestroyImage(blur_image); |
| 3848 | return((Image *) NULL); |
| 3849 | } |
| 3850 | /* |
| 3851 | Threshold blur image. |
| 3852 | */ |
| 3853 | status=MagickTrue; |
| 3854 | progress=0; |
| 3855 | GetMagickPixelPacket(image,&zero); |
| 3856 | bias=image->bias; |
| 3857 | image_view=AcquireCacheView(image); |
| 3858 | blur_view=AcquireCacheView(blur_image); |
| 3859 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 3860 | #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| 3861 | #endif |
| 3862 | for (y=0; y < (long) image->rows; y++) |
| 3863 | { |
| 3864 | MagickBooleanType |
| 3865 | sync; |
| 3866 | |
| 3867 | MagickRealType |
| 3868 | gamma; |
| 3869 | |
| 3870 | register const IndexPacket |
| 3871 | *__restrict indexes; |
| 3872 | |
| 3873 | register const PixelPacket |
| 3874 | *__restrict p; |
| 3875 | |
| 3876 | register IndexPacket |
| 3877 | *__restrict blur_indexes; |
| 3878 | |
| 3879 | register long |
| 3880 | x; |
| 3881 | |
| 3882 | register PixelPacket |
| 3883 | *__restrict q; |
| 3884 | |
| 3885 | if (status == MagickFalse) |
| 3886 | continue; |
| 3887 | p=GetCacheViewVirtualPixels(image_view,-((long) width/2L),y-(long) (width/ |
| 3888 | 2L),image->columns+width,width,exception); |
| 3889 | q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1, |
| 3890 | exception); |
| 3891 | if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL)) |
| 3892 | { |
| 3893 | status=MagickFalse; |
| 3894 | continue; |
| 3895 | } |
| 3896 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 3897 | blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view); |
| 3898 | for (x=0; x < (long) image->columns; x++) |
| 3899 | { |
| 3900 | long |
| 3901 | j, |
| 3902 | v; |
| 3903 | |
| 3904 | MagickPixelPacket |
| 3905 | pixel; |
| 3906 | |
| 3907 | register const double |
| 3908 | *__restrict k; |
| 3909 | |
| 3910 | register long |
| 3911 | u; |
| 3912 | |
| 3913 | pixel=zero; |
| 3914 | k=kernel; |
| 3915 | gamma=0.0; |
| 3916 | j=0; |
| 3917 | if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse)) |
| 3918 | { |
| 3919 | for (v=0; v < (long) width; v++) |
| 3920 | { |
| 3921 | for (u=0; u < (long) width; u++) |
| 3922 | { |
| 3923 | if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse) |
| 3924 | { |
| 3925 | pixel.red+=(*k)*(p+u+j)->red; |
| 3926 | pixel.green+=(*k)*(p+u+j)->green; |
| 3927 | pixel.blue+=(*k)*(p+u+j)->blue; |
| 3928 | gamma+=(*k); |
| 3929 | k++; |
| 3930 | } |
| 3931 | } |
| 3932 | j+=image->columns+width; |
| 3933 | } |
| 3934 | if (gamma != 0.0) |
| 3935 | { |
| 3936 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma); |
| 3937 | if ((channel & RedChannel) != 0) |
| 3938 | q->red=RoundToQuantum(gamma*pixel.red+bias); |
| 3939 | if ((channel & GreenChannel) != 0) |
| 3940 | q->green=RoundToQuantum(gamma*pixel.green+bias); |
| 3941 | if ((channel & BlueChannel) != 0) |
| 3942 | q->blue=RoundToQuantum(gamma*pixel.blue+bias); |
| 3943 | } |
| 3944 | if ((channel & OpacityChannel) != 0) |
| 3945 | { |
| 3946 | gamma=0.0; |
| 3947 | j=0; |
| 3948 | for (v=0; v < (long) width; v++) |
| 3949 | { |
| 3950 | for (u=0; u < (long) width; u++) |
| 3951 | { |
| 3952 | if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse) |
| 3953 | { |
| 3954 | pixel.opacity+=(*k)*(p+u+j)->opacity; |
| 3955 | gamma+=(*k); |
| 3956 | k++; |
| 3957 | } |
| 3958 | } |
| 3959 | j+=image->columns+width; |
| 3960 | } |
| 3961 | if (gamma != 0.0) |
| 3962 | { |
| 3963 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : |
| 3964 | gamma); |
| 3965 | q->opacity=RoundToQuantum(gamma*pixel.opacity+bias); |
| 3966 | } |
| 3967 | } |
| 3968 | if (((channel & IndexChannel) != 0) && |
| 3969 | (image->colorspace == CMYKColorspace)) |
| 3970 | { |
| 3971 | gamma=0.0; |
| 3972 | j=0; |
| 3973 | for (v=0; v < (long) width; v++) |
| 3974 | { |
| 3975 | for (u=0; u < (long) width; u++) |
| 3976 | { |
| 3977 | if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse) |
| 3978 | { |
| 3979 | pixel.index+=(*k)*indexes[x+u+j]; |
| 3980 | gamma+=(*k); |
| 3981 | k++; |
| 3982 | } |
| 3983 | } |
| 3984 | j+=image->columns+width; |
| 3985 | } |
| 3986 | if (gamma != 0.0) |
| 3987 | { |
| 3988 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : |
| 3989 | gamma); |
| 3990 | blur_indexes[x]=RoundToQuantum(gamma*pixel.index+bias); |
| 3991 | } |
| 3992 | } |
| 3993 | } |
| 3994 | else |
| 3995 | { |
| 3996 | MagickRealType |
| 3997 | alpha; |
| 3998 | |
| 3999 | for (v=0; v < (long) width; v++) |
| 4000 | { |
| 4001 | for (u=0; u < (long) width; u++) |
| 4002 | { |
| 4003 | if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse) |
| 4004 | { |
| 4005 | alpha=(MagickRealType) (QuantumScale*(QuantumRange- |
| 4006 | (p+u+j)->opacity)); |
| 4007 | pixel.red+=(*k)*alpha*(p+u+j)->red; |
| 4008 | pixel.green+=(*k)*alpha*(p+u+j)->green; |
| 4009 | pixel.blue+=(*k)*alpha*(p+u+j)->blue; |
| 4010 | pixel.opacity+=(*k)*(p+u+j)->opacity; |
| 4011 | gamma+=(*k)*alpha; |
| 4012 | k++; |
| 4013 | } |
| 4014 | } |
| 4015 | j+=image->columns+width; |
| 4016 | } |
| 4017 | if (gamma != 0.0) |
| 4018 | { |
| 4019 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma); |
| 4020 | if ((channel & RedChannel) != 0) |
| 4021 | q->red=RoundToQuantum(gamma*pixel.red+bias); |
| 4022 | if ((channel & GreenChannel) != 0) |
| 4023 | q->green=RoundToQuantum(gamma*pixel.green+bias); |
| 4024 | if ((channel & BlueChannel) != 0) |
| 4025 | q->blue=RoundToQuantum(gamma*pixel.blue+bias); |
| 4026 | } |
| 4027 | if ((channel & OpacityChannel) != 0) |
| 4028 | { |
| 4029 | gamma=0.0; |
| 4030 | j=0; |
| 4031 | for (v=0; v < (long) width; v++) |
| 4032 | { |
| 4033 | for (u=0; u < (long) width; u++) |
| 4034 | { |
| 4035 | if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse) |
| 4036 | { |
| 4037 | pixel.opacity+=(*k)*(p+u+j)->opacity; |
| 4038 | gamma+=(*k); |
| 4039 | k++; |
| 4040 | } |
| 4041 | } |
| 4042 | j+=image->columns+width; |
| 4043 | } |
| 4044 | if (gamma != 0.0) |
| 4045 | { |
| 4046 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : |
| 4047 | gamma); |
| 4048 | q->opacity=RoundToQuantum(pixel.opacity+bias); |
| 4049 | } |
| 4050 | } |
| 4051 | if (((channel & IndexChannel) != 0) && |
| 4052 | (image->colorspace == CMYKColorspace)) |
| 4053 | { |
| 4054 | gamma=0.0; |
| 4055 | j=0; |
| 4056 | for (v=0; v < (long) width; v++) |
| 4057 | { |
| 4058 | for (u=0; u < (long) width; u++) |
| 4059 | { |
| 4060 | if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse) |
| 4061 | { |
| 4062 | alpha=(MagickRealType) (QuantumScale*(QuantumRange- |
| 4063 | (p+u+j)->opacity)); |
| 4064 | pixel.index+=(*k)*alpha*indexes[x+u+j]; |
| 4065 | gamma+=(*k); |
| 4066 | k++; |
| 4067 | } |
| 4068 | } |
| 4069 | j+=image->columns+width; |
| 4070 | } |
| 4071 | if (gamma != 0.0) |
| 4072 | { |
| 4073 | gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : |
| 4074 | gamma); |
| 4075 | blur_indexes[x]=RoundToQuantum(gamma*pixel.index+bias); |
| 4076 | } |
| 4077 | } |
| 4078 | } |
| 4079 | p++; |
| 4080 | q++; |
| 4081 | } |
| 4082 | sync=SyncCacheViewAuthenticPixels(blur_view,exception); |
| 4083 | if (sync == MagickFalse) |
| 4084 | status=MagickFalse; |
| 4085 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 4086 | { |
| 4087 | MagickBooleanType |
| 4088 | proceed; |
| 4089 | |
| 4090 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 4091 | #pragma omp critical (MagickCore_SelectiveBlurImageChannel) |
| 4092 | #endif |
| 4093 | proceed=SetImageProgress(image,SelectiveBlurImageTag,progress++, |
| 4094 | image->rows); |
| 4095 | if (proceed == MagickFalse) |
| 4096 | status=MagickFalse; |
| 4097 | } |
| 4098 | } |
| 4099 | blur_image->type=image->type; |
| 4100 | blur_view=DestroyCacheView(blur_view); |
| 4101 | image_view=DestroyCacheView(image_view); |
| 4102 | kernel=(double *) RelinquishMagickMemory(kernel); |
| 4103 | if (status == MagickFalse) |
| 4104 | blur_image=DestroyImage(blur_image); |
| 4105 | return(blur_image); |
| 4106 | } |
| 4107 | |
| 4108 | /* |
| 4109 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 4110 | % % |
| 4111 | % % |
| 4112 | % % |
| 4113 | % S h a d e I m a g e % |
| 4114 | % % |
| 4115 | % % |
| 4116 | % % |
| 4117 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 4118 | % |
| 4119 | % ShadeImage() shines a distant light on an image to create a |
| 4120 | % three-dimensional effect. You control the positioning of the light with |
| 4121 | % azimuth and elevation; azimuth is measured in degrees off the x axis |
| 4122 | % and elevation is measured in pixels above the Z axis. |
| 4123 | % |
| 4124 | % The format of the ShadeImage method is: |
| 4125 | % |
| 4126 | % Image *ShadeImage(const Image *image,const MagickBooleanType gray, |
| 4127 | % const double azimuth,const double elevation,ExceptionInfo *exception) |
| 4128 | % |
| 4129 | % A description of each parameter follows: |
| 4130 | % |
| 4131 | % o image: the image. |
| 4132 | % |
| 4133 | % o gray: A value other than zero shades the intensity of each pixel. |
| 4134 | % |
| 4135 | % o azimuth, elevation: Define the light source direction. |
| 4136 | % |
| 4137 | % o exception: return any errors or warnings in this structure. |
| 4138 | % |
| 4139 | */ |
| 4140 | MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray, |
| 4141 | const double azimuth,const double elevation,ExceptionInfo *exception) |
| 4142 | { |
| 4143 | #define ShadeImageTag "Shade/Image" |
| 4144 | |
| 4145 | Image |
| 4146 | *shade_image; |
| 4147 | |
| 4148 | long |
| 4149 | progress, |
| 4150 | y; |
| 4151 | |
| 4152 | MagickBooleanType |
| 4153 | status; |
| 4154 | |
| 4155 | PrimaryInfo |
| 4156 | light; |
| 4157 | |
| 4158 | CacheView |
| 4159 | *image_view, |
| 4160 | *shade_view; |
| 4161 | |
| 4162 | /* |
| 4163 | Initialize shaded image attributes. |
| 4164 | */ |
| 4165 | assert(image != (const Image *) NULL); |
| 4166 | assert(image->signature == MagickSignature); |
| 4167 | if (image->debug != MagickFalse) |
| 4168 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 4169 | assert(exception != (ExceptionInfo *) NULL); |
| 4170 | assert(exception->signature == MagickSignature); |
| 4171 | shade_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception); |
| 4172 | if (shade_image == (Image *) NULL) |
| 4173 | return((Image *) NULL); |
| 4174 | if (SetImageStorageClass(shade_image,DirectClass) == MagickFalse) |
| 4175 | { |
| 4176 | InheritException(exception,&shade_image->exception); |
| 4177 | shade_image=DestroyImage(shade_image); |
| 4178 | return((Image *) NULL); |
| 4179 | } |
| 4180 | /* |
| 4181 | Compute the light vector. |
| 4182 | */ |
| 4183 | light.x=(double) QuantumRange*cos(DegreesToRadians(azimuth))* |
| 4184 | cos(DegreesToRadians(elevation)); |
| 4185 | light.y=(double) QuantumRange*sin(DegreesToRadians(azimuth))* |
| 4186 | cos(DegreesToRadians(elevation)); |
| 4187 | light.z=(double) QuantumRange*sin(DegreesToRadians(elevation)); |
| 4188 | /* |
| 4189 | Shade image. |
| 4190 | */ |
| 4191 | status=MagickTrue; |
| 4192 | progress=0; |
| 4193 | image_view=AcquireCacheView(image); |
| 4194 | shade_view=AcquireCacheView(shade_image); |
| 4195 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 4196 | #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| 4197 | #endif |
| 4198 | for (y=0; y < (long) image->rows; y++) |
| 4199 | { |
| 4200 | MagickRealType |
| 4201 | distance, |
| 4202 | normal_distance, |
| 4203 | shade; |
| 4204 | |
| 4205 | PrimaryInfo |
| 4206 | normal; |
| 4207 | |
| 4208 | register const PixelPacket |
| 4209 | *__restrict p, |
| 4210 | *__restrict s0, |
| 4211 | *__restrict s1, |
| 4212 | *__restrict s2; |
| 4213 | |
| 4214 | register long |
| 4215 | x; |
| 4216 | |
| 4217 | register PixelPacket |
| 4218 | *__restrict q; |
| 4219 | |
| 4220 | if (status == MagickFalse) |
| 4221 | continue; |
| 4222 | p=GetCacheViewVirtualPixels(image_view,-1,y-1,image->columns+2,3,exception); |
| 4223 | q=QueueCacheViewAuthenticPixels(shade_view,0,y,shade_image->columns,1, |
| 4224 | exception); |
| 4225 | if ((p == (PixelPacket *) NULL) || (q == (PixelPacket *) NULL)) |
| 4226 | { |
| 4227 | status=MagickFalse; |
| 4228 | continue; |
| 4229 | } |
| 4230 | /* |
| 4231 | Shade this row of pixels. |
| 4232 | */ |
| 4233 | normal.z=2.0*(double) QuantumRange; /* constant Z of surface normal */ |
| 4234 | s0=p+1; |
| 4235 | s1=s0+image->columns+2; |
| 4236 | s2=s1+image->columns+2; |
| 4237 | for (x=0; x < (long) image->columns; x++) |
| 4238 | { |
| 4239 | /* |
| 4240 | Determine the surface normal and compute shading. |
| 4241 | */ |
| 4242 | normal.x=(double) (PixelIntensity(s0-1)+PixelIntensity(s1-1)+ |
| 4243 | PixelIntensity(s2-1)-PixelIntensity(s0+1)-PixelIntensity(s1+1)- |
| 4244 | PixelIntensity(s2+1)); |
| 4245 | normal.y=(double) (PixelIntensity(s2-1)+PixelIntensity(s2)+ |
| 4246 | PixelIntensity(s2+1)-PixelIntensity(s0-1)-PixelIntensity(s0)- |
| 4247 | PixelIntensity(s0+1)); |
| 4248 | if ((normal.x == 0.0) && (normal.y == 0.0)) |
| 4249 | shade=light.z; |
| 4250 | else |
| 4251 | { |
| 4252 | shade=0.0; |
| 4253 | distance=normal.x*light.x+normal.y*light.y+normal.z*light.z; |
| 4254 | if (distance > MagickEpsilon) |
| 4255 | { |
| 4256 | normal_distance= |
| 4257 | normal.x*normal.x+normal.y*normal.y+normal.z*normal.z; |
| 4258 | if (normal_distance > (MagickEpsilon*MagickEpsilon)) |
| 4259 | shade=distance/sqrt((double) normal_distance); |
| 4260 | } |
| 4261 | } |
| 4262 | if (gray != MagickFalse) |
| 4263 | { |
| 4264 | q->red=(Quantum) shade; |
| 4265 | q->green=(Quantum) shade; |
| 4266 | q->blue=(Quantum) shade; |
| 4267 | } |
| 4268 | else |
| 4269 | { |
| 4270 | q->red=RoundToQuantum(QuantumScale*shade*s1->red); |
| 4271 | q->green=RoundToQuantum(QuantumScale*shade*s1->green); |
| 4272 | q->blue=RoundToQuantum(QuantumScale*shade*s1->blue); |
| 4273 | } |
| 4274 | q->opacity=s1->opacity; |
| 4275 | s0++; |
| 4276 | s1++; |
| 4277 | s2++; |
| 4278 | q++; |
| 4279 | } |
| 4280 | if (SyncCacheViewAuthenticPixels(shade_view,exception) == MagickFalse) |
| 4281 | status=MagickFalse; |
| 4282 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 4283 | { |
| 4284 | MagickBooleanType |
| 4285 | proceed; |
| 4286 | |
| 4287 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 4288 | #pragma omp critical (MagickCore_ShadeImage) |
| 4289 | #endif |
| 4290 | proceed=SetImageProgress(image,ShadeImageTag,progress++,image->rows); |
| 4291 | if (proceed == MagickFalse) |
| 4292 | status=MagickFalse; |
| 4293 | } |
| 4294 | } |
| 4295 | shade_view=DestroyCacheView(shade_view); |
| 4296 | image_view=DestroyCacheView(image_view); |
| 4297 | if (status == MagickFalse) |
| 4298 | shade_image=DestroyImage(shade_image); |
| 4299 | return(shade_image); |
| 4300 | } |
| 4301 | |
| 4302 | /* |
| 4303 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 4304 | % % |
| 4305 | % % |
| 4306 | % % |
| 4307 | % S h a r p e n I m a g e % |
| 4308 | % % |
| 4309 | % % |
| 4310 | % % |
| 4311 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 4312 | % |
| 4313 | % SharpenImage() sharpens the image. We convolve the image with a Gaussian |
| 4314 | % operator of the given radius and standard deviation (sigma). For |
| 4315 | % reasonable results, radius should be larger than sigma. Use a radius of 0 |
| 4316 | % and SharpenImage() selects a suitable radius for you. |
| 4317 | % |
| 4318 | % Using a separable kernel would be faster, but the negative weights cancel |
| 4319 | % out on the corners of the kernel producing often undesirable ringing in the |
| 4320 | % filtered result; this can be avoided by using a 2D gaussian shaped image |
| 4321 | % sharpening kernel instead. |
| 4322 | % |
| 4323 | % The format of the SharpenImage method is: |
| 4324 | % |
| 4325 | % Image *SharpenImage(const Image *image,const double radius, |
| 4326 | % const double sigma,ExceptionInfo *exception) |
| 4327 | % Image *SharpenImageChannel(const Image *image,const ChannelType channel, |
| 4328 | % const double radius,const double sigma,ExceptionInfo *exception) |
| 4329 | % |
| 4330 | % A description of each parameter follows: |
| 4331 | % |
| 4332 | % o image: the image. |
| 4333 | % |
| 4334 | % o channel: the channel type. |
| 4335 | % |
| 4336 | % o radius: the radius of the Gaussian, in pixels, not counting the center |
| 4337 | % pixel. |
| 4338 | % |
| 4339 | % o sigma: the standard deviation of the Laplacian, in pixels. |
| 4340 | % |
| 4341 | % o exception: return any errors or warnings in this structure. |
| 4342 | % |
| 4343 | */ |
| 4344 | |
| 4345 | MagickExport Image *SharpenImage(const Image *image,const double radius, |
| 4346 | const double sigma,ExceptionInfo *exception) |
| 4347 | { |
| 4348 | Image |
| 4349 | *sharp_image; |
| 4350 | |
| 4351 | sharp_image=SharpenImageChannel(image,DefaultChannels,radius,sigma,exception); |
| 4352 | return(sharp_image); |
| 4353 | } |
| 4354 | |
| 4355 | MagickExport Image *SharpenImageChannel(const Image *image, |
| 4356 | const ChannelType channel,const double radius,const double sigma, |
| 4357 | ExceptionInfo *exception) |
| 4358 | { |
| 4359 | double |
| 4360 | *kernel; |
| 4361 | |
| 4362 | Image |
| 4363 | *sharp_image; |
| 4364 | |
| 4365 | MagickRealType |
| 4366 | alpha, |
| 4367 | normalize; |
| 4368 | |
| 4369 | register long |
| 4370 | i, |
| 4371 | u, |
| 4372 | v; |
| 4373 | |
| 4374 | unsigned long |
| 4375 | width; |
| 4376 | |
| 4377 | assert(image != (const Image *) NULL); |
| 4378 | assert(image->signature == MagickSignature); |
| 4379 | if (image->debug != MagickFalse) |
| 4380 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 4381 | assert(exception != (ExceptionInfo *) NULL); |
| 4382 | assert(exception->signature == MagickSignature); |
| 4383 | width=GetOptimalKernelWidth2D(radius,sigma); |
| 4384 | kernel=(double *) AcquireQuantumMemory((size_t) width*width,sizeof(*kernel)); |
| 4385 | if (kernel == (double *) NULL) |
| 4386 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 4387 | i=0; |
| 4388 | normalize=0.0; |
| 4389 | for (v=(-((long) width/2)); v <= (long) (width/2); v++) |
| 4390 | { |
| 4391 | for (u=(-((long) width/2)); u <= (long) (width/2); u++) |
| 4392 | { |
| 4393 | alpha=exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma)); |
| 4394 | kernel[i]=(double) (-alpha/(2.0*MagickPI*MagickSigma*MagickSigma)); |
| 4395 | normalize+=kernel[i]; |
| 4396 | i++; |
| 4397 | } |
| 4398 | } |
| 4399 | kernel[i/2]=(double) ((-2.0)*normalize); |
| 4400 | sharp_image=ConvolveImageChannel(image,channel,width,kernel,exception); |
| 4401 | kernel=(double *) RelinquishMagickMemory(kernel); |
| 4402 | return(sharp_image); |
| 4403 | } |
| 4404 | |
| 4405 | /* |
| 4406 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 4407 | % % |
| 4408 | % % |
| 4409 | % % |
| 4410 | % S p r e a d I m a g e % |
| 4411 | % % |
| 4412 | % % |
| 4413 | % % |
| 4414 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 4415 | % |
| 4416 | % SpreadImage() is a special effects method that randomly displaces each |
| 4417 | % pixel in a block defined by the radius parameter. |
| 4418 | % |
| 4419 | % The format of the SpreadImage method is: |
| 4420 | % |
| 4421 | % Image *SpreadImage(const Image *image,const double radius, |
| 4422 | % ExceptionInfo *exception) |
| 4423 | % |
| 4424 | % A description of each parameter follows: |
| 4425 | % |
| 4426 | % o image: the image. |
| 4427 | % |
| 4428 | % o radius: Choose a random pixel in a neighborhood of this extent. |
| 4429 | % |
| 4430 | % o exception: return any errors or warnings in this structure. |
| 4431 | % |
| 4432 | */ |
| 4433 | MagickExport Image *SpreadImage(const Image *image,const double radius, |
| 4434 | ExceptionInfo *exception) |
| 4435 | { |
| 4436 | #define SpreadImageTag "Spread/Image" |
| 4437 | |
| 4438 | Image |
| 4439 | *spread_image; |
| 4440 | |
| 4441 | long |
| 4442 | progress, |
| 4443 | y; |
| 4444 | |
| 4445 | MagickBooleanType |
| 4446 | status; |
| 4447 | |
| 4448 | MagickPixelPacket |
| 4449 | zero; |
| 4450 | |
| 4451 | RandomInfo |
| 4452 | **random_info; |
| 4453 | |
| 4454 | ResampleFilter |
| 4455 | **resample_filter; |
| 4456 | |
| 4457 | unsigned long |
| 4458 | width; |
| 4459 | |
| 4460 | CacheView |
| 4461 | *image_view; |
| 4462 | |
| 4463 | /* |
| 4464 | Initialize spread image attributes. |
| 4465 | */ |
| 4466 | assert(image != (Image *) NULL); |
| 4467 | assert(image->signature == MagickSignature); |
| 4468 | if (image->debug != MagickFalse) |
| 4469 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 4470 | assert(exception != (ExceptionInfo *) NULL); |
| 4471 | assert(exception->signature == MagickSignature); |
| 4472 | spread_image=CloneImage(image,image->columns,image->rows,MagickTrue, |
| 4473 | exception); |
| 4474 | if (spread_image == (Image *) NULL) |
| 4475 | return((Image *) NULL); |
| 4476 | if (SetImageStorageClass(spread_image,DirectClass) == MagickFalse) |
| 4477 | { |
| 4478 | InheritException(exception,&spread_image->exception); |
| 4479 | spread_image=DestroyImage(spread_image); |
| 4480 | return((Image *) NULL); |
| 4481 | } |
| 4482 | /* |
| 4483 | Spread image. |
| 4484 | */ |
| 4485 | status=MagickTrue; |
| 4486 | progress=0; |
| 4487 | GetMagickPixelPacket(spread_image,&zero); |
| 4488 | width=GetOptimalKernelWidth1D(radius,0.5); |
| 4489 | resample_filter=AcquireResampleFilterThreadSet(image,MagickTrue,exception); |
| 4490 | random_info=AcquireRandomInfoThreadSet(); |
| 4491 | image_view=AcquireCacheView(spread_image); |
| 4492 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 4493 | #pragma omp parallel for schedule(dynamic,8) shared(progress,status) |
| 4494 | #endif |
| 4495 | for (y=0; y < (long) spread_image->rows; y++) |
| 4496 | { |
| 4497 | MagickPixelPacket |
| 4498 | pixel; |
| 4499 | |
| 4500 | register IndexPacket |
| 4501 | *__restrict indexes; |
| 4502 | |
| 4503 | register long |
| 4504 | id, |
| 4505 | x; |
| 4506 | |
| 4507 | register PixelPacket |
| 4508 | *__restrict q; |
| 4509 | |
| 4510 | if (status == MagickFalse) |
| 4511 | continue; |
| 4512 | q=QueueCacheViewAuthenticPixels(image_view,0,y,spread_image->columns,1, |
| 4513 | exception); |
| 4514 | if (q == (PixelPacket *) NULL) |
| 4515 | { |
| 4516 | status=MagickFalse; |
| 4517 | continue; |
| 4518 | } |
| 4519 | indexes=GetCacheViewAuthenticIndexQueue(image_view); |
| 4520 | pixel=zero; |
| 4521 | id=GetOpenMPThreadId(); |
| 4522 | for (x=0; x < (long) spread_image->columns; x++) |
| 4523 | { |
| 4524 | (void) ResamplePixelColor(resample_filter[id],(double) x+width* |
| 4525 | (GetPseudoRandomValue(random_info[id])-0.5),(double) y+width* |
| 4526 | (GetPseudoRandomValue(random_info[id])-0.5),&pixel); |
| 4527 | SetPixelPacket(spread_image,&pixel,q,indexes+x); |
| 4528 | q++; |
| 4529 | } |
| 4530 | if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse) |
| 4531 | status=MagickFalse; |
| 4532 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 4533 | { |
| 4534 | MagickBooleanType |
| 4535 | proceed; |
| 4536 | |
| 4537 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 4538 | #pragma omp critical (MagickCore_SpreadImage) |
| 4539 | #endif |
| 4540 | proceed=SetImageProgress(image,SpreadImageTag,progress++,image->rows); |
| 4541 | if (proceed == MagickFalse) |
| 4542 | status=MagickFalse; |
| 4543 | } |
| 4544 | } |
| 4545 | image_view=DestroyCacheView(image_view); |
| 4546 | random_info=DestroyRandomInfoThreadSet(random_info); |
| 4547 | resample_filter=DestroyResampleFilterThreadSet(resample_filter); |
| 4548 | return(spread_image); |
| 4549 | } |
| 4550 | |
| 4551 | /* |
| 4552 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 4553 | % % |
| 4554 | % % |
| 4555 | % % |
| 4556 | % U n s h a r p M a s k I m a g e % |
| 4557 | % % |
| 4558 | % % |
| 4559 | % % |
| 4560 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 4561 | % |
| 4562 | % UnsharpMaskImage() sharpens one or more image channels. We convolve the |
| 4563 | % image with a Gaussian operator of the given radius and standard deviation |
| 4564 | % (sigma). For reasonable results, radius should be larger than sigma. Use a |
| 4565 | % radius of 0 and UnsharpMaskImage() selects a suitable radius for you. |
| 4566 | % |
| 4567 | % The format of the UnsharpMaskImage method is: |
| 4568 | % |
| 4569 | % Image *UnsharpMaskImage(const Image *image,const double radius, |
| 4570 | % const double sigma,const double amount,const double threshold, |
| 4571 | % ExceptionInfo *exception) |
| 4572 | % Image *UnsharpMaskImageChannel(const Image *image, |
| 4573 | % const ChannelType channel,const double radius,const double sigma, |
| 4574 | % const double amount,const double threshold,ExceptionInfo *exception) |
| 4575 | % |
| 4576 | % A description of each parameter follows: |
| 4577 | % |
| 4578 | % o image: the image. |
| 4579 | % |
| 4580 | % o channel: the channel type. |
| 4581 | % |
| 4582 | % o radius: the radius of the Gaussian, in pixels, not counting the center |
| 4583 | % pixel. |
| 4584 | % |
| 4585 | % o sigma: the standard deviation of the Gaussian, in pixels. |
| 4586 | % |
| 4587 | % o amount: the percentage of the difference between the original and the |
| 4588 | % blur image that is added back into the original. |
| 4589 | % |
| 4590 | % o threshold: the threshold in pixels needed to apply the diffence amount. |
| 4591 | % |
| 4592 | % o exception: return any errors or warnings in this structure. |
| 4593 | % |
| 4594 | */ |
| 4595 | |
| 4596 | MagickExport Image *UnsharpMaskImage(const Image *image,const double radius, |
| 4597 | const double sigma,const double amount,const double threshold, |
| 4598 | ExceptionInfo *exception) |
| 4599 | { |
| 4600 | Image |
| 4601 | *sharp_image; |
| 4602 | |
| 4603 | sharp_image=UnsharpMaskImageChannel(image,DefaultChannels,radius,sigma,amount, |
| 4604 | threshold,exception); |
| 4605 | return(sharp_image); |
| 4606 | } |
| 4607 | |
| 4608 | MagickExport Image *UnsharpMaskImageChannel(const Image *image, |
| 4609 | const ChannelType channel,const double radius,const double sigma, |
| 4610 | const double amount,const double threshold,ExceptionInfo *exception) |
| 4611 | { |
| 4612 | #define SharpenImageTag "Sharpen/Image" |
| 4613 | |
| 4614 | Image |
| 4615 | *unsharp_image; |
| 4616 | |
| 4617 | long |
| 4618 | progress, |
| 4619 | y; |
| 4620 | |
| 4621 | MagickBooleanType |
| 4622 | status; |
| 4623 | |
| 4624 | MagickPixelPacket |
| 4625 | zero; |
| 4626 | |
| 4627 | MagickRealType |
| 4628 | quantum_threshold; |
| 4629 | |
| 4630 | CacheView |
| 4631 | *image_view, |
| 4632 | *unsharp_view; |
| 4633 | |
| 4634 | assert(image != (const Image *) NULL); |
| 4635 | assert(image->signature == MagickSignature); |
| 4636 | if (image->debug != MagickFalse) |
| 4637 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 4638 | assert(exception != (ExceptionInfo *) NULL); |
| 4639 | unsharp_image=BlurImageChannel(image,channel,radius,sigma,exception); |
| 4640 | if (unsharp_image == (Image *) NULL) |
| 4641 | return((Image *) NULL); |
| 4642 | quantum_threshold=(MagickRealType) QuantumRange*threshold; |
| 4643 | /* |
| 4644 | Unsharp-mask image. |
| 4645 | */ |
| 4646 | status=MagickTrue; |
| 4647 | progress=0; |
| 4648 | GetMagickPixelPacket(image,&zero); |
| 4649 | image_view=AcquireCacheView(image); |
| 4650 | unsharp_view=AcquireCacheView(unsharp_image); |
| 4651 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 4652 | #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| 4653 | #endif |
| 4654 | for (y=0; y < (long) image->rows; y++) |
| 4655 | { |
| 4656 | MagickPixelPacket |
| 4657 | pixel; |
| 4658 | |
| 4659 | register const IndexPacket |
| 4660 | *__restrict indexes; |
| 4661 | |
| 4662 | register const PixelPacket |
| 4663 | *__restrict p; |
| 4664 | |
| 4665 | register IndexPacket |
| 4666 | *__restrict unsharp_indexes; |
| 4667 | |
| 4668 | register long |
| 4669 | x; |
| 4670 | |
| 4671 | register PixelPacket |
| 4672 | *__restrict q; |
| 4673 | |
| 4674 | if (status == MagickFalse) |
| 4675 | continue; |
| 4676 | p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception); |
| 4677 | q=GetCacheViewAuthenticPixels(unsharp_view,0,y,unsharp_image->columns,1, |
| 4678 | exception); |
| 4679 | if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL)) |
| 4680 | { |
| 4681 | status=MagickFalse; |
| 4682 | continue; |
| 4683 | } |
| 4684 | indexes=GetCacheViewVirtualIndexQueue(image_view); |
| 4685 | unsharp_indexes=GetCacheViewAuthenticIndexQueue(unsharp_view); |
| 4686 | pixel=zero; |
| 4687 | for (x=0; x < (long) image->columns; x++) |
| 4688 | { |
| 4689 | if ((channel & RedChannel) != 0) |
| 4690 | { |
| 4691 | pixel.red=p->red-(MagickRealType) q->red; |
| 4692 | if (fabs(2.0*pixel.red) < quantum_threshold) |
| 4693 | pixel.red=(MagickRealType) p->red; |
| 4694 | else |
| 4695 | pixel.red=(MagickRealType) p->red+(pixel.red*amount); |
| 4696 | q->red=RoundToQuantum(pixel.red); |
| 4697 | } |
| 4698 | if ((channel & GreenChannel) != 0) |
| 4699 | { |
| 4700 | pixel.green=p->green-(MagickRealType) q->green; |
| 4701 | if (fabs(2.0*pixel.green) < quantum_threshold) |
| 4702 | pixel.green=(MagickRealType) p->green; |
| 4703 | else |
| 4704 | pixel.green=(MagickRealType) p->green+(pixel.green*amount); |
| 4705 | q->green=RoundToQuantum(pixel.green); |
| 4706 | } |
| 4707 | if ((channel & BlueChannel) != 0) |
| 4708 | { |
| 4709 | pixel.blue=p->blue-(MagickRealType) q->blue; |
| 4710 | if (fabs(2.0*pixel.blue) < quantum_threshold) |
| 4711 | pixel.blue=(MagickRealType) p->blue; |
| 4712 | else |
| 4713 | pixel.blue=(MagickRealType) p->blue+(pixel.blue*amount); |
| 4714 | q->blue=RoundToQuantum(pixel.blue); |
| 4715 | } |
| 4716 | if ((channel & OpacityChannel) != 0) |
| 4717 | { |
| 4718 | pixel.opacity=p->opacity-(MagickRealType) q->opacity; |
| 4719 | if (fabs(2.0*pixel.opacity) < quantum_threshold) |
| 4720 | pixel.opacity=(MagickRealType) p->opacity; |
| 4721 | else |
| 4722 | pixel.opacity=p->opacity+(pixel.opacity*amount); |
| 4723 | q->opacity=RoundToQuantum(pixel.opacity); |
| 4724 | } |
| 4725 | if (((channel & IndexChannel) != 0) && |
| 4726 | (image->colorspace == CMYKColorspace)) |
| 4727 | { |
| 4728 | pixel.index=unsharp_indexes[x]-(MagickRealType) indexes[x]; |
| 4729 | if (fabs(2.0*pixel.index) < quantum_threshold) |
| 4730 | pixel.index=(MagickRealType) unsharp_indexes[x]; |
| 4731 | else |
| 4732 | pixel.index=(MagickRealType) unsharp_indexes[x]+(pixel.index* |
| 4733 | amount); |
| 4734 | unsharp_indexes[x]=RoundToQuantum(pixel.index); |
| 4735 | } |
| 4736 | p++; |
| 4737 | q++; |
| 4738 | } |
| 4739 | if (SyncCacheViewAuthenticPixels(unsharp_view,exception) == MagickFalse) |
| 4740 | status=MagickFalse; |
| 4741 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 4742 | { |
| 4743 | MagickBooleanType |
| 4744 | proceed; |
| 4745 | |
| 4746 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 4747 | #pragma omp critical (MagickCore_UnsharpMaskImageChannel) |
| 4748 | #endif |
| 4749 | proceed=SetImageProgress(image,SharpenImageTag,progress++,image->rows); |
| 4750 | if (proceed == MagickFalse) |
| 4751 | status=MagickFalse; |
| 4752 | } |
| 4753 | } |
| 4754 | unsharp_image->type=image->type; |
| 4755 | unsharp_view=DestroyCacheView(unsharp_view); |
| 4756 | image_view=DestroyCacheView(image_view); |
| 4757 | if (status == MagickFalse) |
| 4758 | unsharp_image=DestroyImage(unsharp_image); |
| 4759 | return(unsharp_image); |
| 4760 | } |