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18 <meta name="Description" content="ImageMagick® is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX. Use ImageMagick to translate, flip, mirror, rotate, scale, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves. ImageMagick is free software delivered as a ready-to-run binary distribution or as source code that you can freely use, copy, modify, and distribute. Its license is compatible with the GPL. It runs on all major operating systems. The functionality of ImageMagick is typically utilized from the command line or you can use the features from programs written in your favorite programming language. Choose from these interfaces: MagickCore (C), MagickWand (C), ChMagick (Ch), Magick++ (C++), JMagick (Java), L-Magick (Lisp), PascalMagick (Pascal), PerlMagick (Perl), MagickWand for PHP (PHP), PythonMagick (Python), RMagick (Ruby), or TclMagick (Tcl/TK). With a language interface, use ImageMagick to modify or create images automagically and dynamically."/>
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148
149<p class="navigation-index">[<a href="#usage">Example Usage</a> &bull; <a href="#options">Option Summary</a>]</p>
150
151<div class="doc-section">
152<p>Use the <kbd>convert</kbd> program to convert between image formats as well as resize an image, blur, crop, despeckle, dither, draw on, flip, join, re-sample, and much more. See <a href="../www/command-line-processing.html">Command Line Processing</a> for advice on how to structure your <kbd>convert</kbd> command or see below for example usages of the command.</p>
153</div>
154
155<h2><a name="usage"></a>Example Usage</h2>
156<div class="doc-section">
157
158<p>We list a few examples of the <kbd>convert</kbd> command here to illustrate its usefulness and ease of use. To get started, lets convert an image in the JPEG format to PNG:</p>
159
160<p class='crt'><span class="crtprompt"> $magick&gt; </span><span class='crtin'>convert rose.jpg rose.png</span></p>
161<p>Next, we reduce the image size before it is written to the PNG format:</p>
162
163<p class='crt'><span class="crtprompt"> $magick&gt; </span><span class='crtin'>convert rose.jpg -resize 50% rose.png</span></p>
164<p class="image">
165 <a href="../images/rose.jpg">
166 <img src="../images/rose.jpg" width="70" height="46" alt="rose" />
167 </a>
168 <img style="margin-top:13px; margin-bottom:13px;" src="../images/right.gif" width="20" height="20" alt="==>" />
169 <a href="../images/rose.png">
170 <img style="margin-top:11px; margin-bottom:12px;" src="../images/rose.png" width="35" height="23" alt="rose" />
171 </a>
172</p>
173
174<p>You can combine multiple image-processing operations to produce complex results:</p>
175
176<p class='crt'><span class="crtprompt"> $magick&gt; </span><span class='crtin'>convert -size 320x85 xc:transparent -font Bookman-DemiItalic -pointsize 72 \ <br/>
177-draw "text 25,60 'Magick'" -channel RGBA -gaussian 0x6 -fill darkred -stroke magenta \ <br/>
178-draw "text 20,55 'Magick'" fuzzy-magick.png</span></p>
179<p class="image">
180 <a href="../images/fuzzy-magick.png"><img src="../images/fuzzy-magick.png" width="320" height="85" alt="fuzzy-magick" /></a>
181</p>
182
183<p>You can find additional examples of using <kbd>convert</kbd> in <a href="http://www.imagemagick.org/Usage/">Examples of ImageMagick Usage</a>.</p>
184
185</div>
186
187<h2><a name="options"></a>Option Summary</h2>
188<div class="doc-section">
189
190<p>The <kbd>convert</kbd> command recognizes these options. Click on an option to get more details about how that option works.</p>
191
192<table class="doc">
193 <tbody>
194 <tr>
195 <th align="left">Option</th>
196 <th align="left">Description</th>
197 </tr>
198
199 <tr>
200 <td valign="top"><a href="../www/command-line-options.html#adaptive-blur">-adaptive-blur <em class="option">geometry</em></a></td>
201 <td valign="top">adaptively blur pixels; decrease effect near edges</td>
202 </tr>
203
204 <tr>
205 <td valign="top"><a href="../www/command-line-options.html#adaptive-resize">-adaptive-resize <em class="option">geometry</em></a></td>
206 <td valign="top">adaptively resize image with data dependent triangulation.</td>
207 </tr>
208
209 <tr>
210 <td valign="top"><a href="../www/command-line-options.html#adaptive-sharpen">-adaptive-sharpen <em class="option">geometry</em></a></td>
211 <td valign="top">adaptively sharpen pixels; increase effect near edges</td>
212 </tr>
213
214 <tr>
215 <td valign="top"><a href="../www/command-line-options.html#adjoin">-adjoin</a></td>
216 <td valign="top">join images into a single multi-image file</td>
217 </tr>
218
219 <tr>
220 <td valign="top"><a href="../www/command-line-options.html#affine">-affine <em class="option">matrix</em></a></td>
221 <td valign="top">affine transform matrix</td>
222 </tr>
223
224 <tr>
225 <td valign="top"><a href="../www/command-line-options.html#alpha">-alpha</a></td>
226 <td valign="top">on, activate, off, deactivate, set, opaque, copy",
227transparent, extract, background, or shape the alpha channel</td>
228 </tr>
229
230 <tr>
231 <td valign="top"><a href="../www/command-line-options.html#annotate">-annotate <em class="option">geometry text</em></a></td>
232 <td valign="top">annotate the image with text</td>
233 </tr>
234
235 <tr>
236 <td valign="top"><a href="../www/command-line-options.html#antialias">-antialias</a></td>
237 <td valign="top">remove pixel-aliasing</td>
238 </tr>
239
240 <tr>
241 <td valign="top"><a href="../www/command-line-options.html#append">-append</a></td>
242 <td valign="top">append an image sequence</td>
243 </tr>
244
245 <tr>
246 <td valign="top"><a href="../www/command-line-options.html#authenticate">-authenticate <em class="option">value</em></a></td>
247 <td valign="top">decipher image with this password</td>
248 </tr>
249
250 <tr>
251 <td valign="top"><a href="../www/command-line-options.html#auto-gamma">-auto-gamma</a></td>
252 <td valign="top">automagically adjust gamma level of image</td>
253 </tr>
254
255 <tr>
256 <td valign="top"><a href="../www/command-line-options.html#auto-level">-auto-level</a></td>
257 <td valign="top">automagically adjust color levels of image</td>
258 </tr>
259
260 <tr>
261 <td valign="top"><a href="../www/command-line-options.html#auto-orient">-auto-orient</a></td>
262 <td valign="top">automagically orient image</td>
263 </tr>
264
265 <tr>
266 <td valign="top"><a href="../www/command-line-options.html#average">-average</a></td>
267 <td valign="top">average an image sequence</td>
268 </tr>
269
270 <tr>
271 <td valign="top"><a href="../www/command-line-options.html#background">-background <em class="option">color</em></a></td>
272 <td valign="top">background color</td>
273 </tr>
274
275 <tr>
276 <td valign="top"><a href="../www/command-line-options.html#bench">-bench <em class="option">iterations</em></a></td>
277 <td valign="top">measure performance</td>
278 </tr>
279
280 <tr>
281 <td valign="top"><a href="../www/command-line-options.html#bias">-bias <em class="option">value</em></a></td>
282 <td valign="top">add bias when convolving an image</td>
283 </tr>
284
285 <tr>
286 <td valign="top"><a href="../www/command-line-options.html#black-threshold">-black-threshold <em class="option">value</em></a></td>
287 <td valign="top">force all pixels below the threshold into black</td>
288 </tr>
289
290 <tr>
291 <td valign="top"><a href="../www/command-line-options.html#blue-primary">-blue-primary <em class="option">point</em></a></td>
292 <td valign="top">chromaticity blue primary point</td>
293 </tr>
294
295 <tr>
296 <td valign="top"><a href="../www/command-line-options.html#blue-shift">-blue-shift <em class="option">factor</em></a></td>
297 <td valign="top">simulate a scene at nighttime in the moonlight</td>
298 </tr>
299
300 <tr>
301 <td valign="top"><a href="../www/command-line-options.html#blur">-blur <em class="option">geometry</em></a></td>
302 <td valign="top">reduce image noise and reduce detail levels</td>
303 </tr>
304
305 <tr>
306 <td valign="top"><a href="../www/command-line-options.html#border">-border <em class="option">geometry</em></a></td>
307 <td valign="top">surround image with a border of color</td>
308 </tr>
309
310 <tr>
311 <td valign="top"><a href="../www/command-line-options.html#bordercolor">-bordercolor <em class="option">color</em></a></td>
312 <td valign="top">border color</td>
313 </tr>
314
315 <tr>
316 <td valign="top"><a href="../www/command-line-options.html#caption">-caption <em class="option">string</em></a></td>
317 <td valign="top">assign a caption to an image</td>
318 </tr>
319
320 <tr>
321 <td valign="top"><a href="../www/command-line-options.html#cdl">-cdl <em class="option">filename</em></a></td>
322 <td valign="top">color correct with a color decision list</td>
323 </tr>
324
325 <tr>
326 <td valign="top"><a href="../www/command-line-options.html#channel">-channel <em class="option">type</em></a></td>
327 <td valign="top">apply option to select image channels</td>
328 </tr>
329
330 <tr>
331 <td valign="top"><a href="../www/command-line-options.html#charcoal">-charcoal <em class="option">radius</em></a></td>
332 <td valign="top">simulate a charcoal drawing</td>
333 </tr>
334
335 <tr>
336 <td valign="top"><a href="../www/command-line-options.html#chop">-chop <em class="option">geometry</em></a></td>
337 <td valign="top">remove pixels from the image interior</td>
338 </tr>
339
340 <tr>
341 <td valign="top"><a href="../www/command-line-options.html#clip">-clip</a></td>
342 <td valign="top">clip along the first path from the 8BIM profile</td>
343 </tr>
344
345 <tr>
346 <td valign="top"><a href="../www/command-line-options.html#clip-mask">-clip-mask</a> <em class="option">filename</em></td>
347 <td valign="top">associate clip mask with the image</td>
348 </tr>
349
350 <tr>
351 <td valign="top"><a href="../www/command-line-options.html#clip-path">-clip-path <em class="option">id</em></a></td>
352 <td valign="top">clip along a named path from the 8BIM profile</td>
353 </tr>
354
355 <tr>
356 <td valign="top"><a href="../www/command-line-options.html#clone">-clone <em class="option">index</em></a></td>
357 <td valign="top">clone an image</td>
358 </tr>
359
360 <tr>
361 <td valign="top"><a href="../www/command-line-options.html#clut">-clut</a></td>
362 <td valign="top">apply a color lookup table to the image</td>
363 </tr>
364
365 <tr>
366 <td valign="top"><a href="../www/command-line-options.html#contrast-stretch">-contrast-stretch <em class="option">geometry</em></a></td>
367 <td valign="top">improve the contrast in an image by `stretching' the range of intensity value</td>
368 </tr>
369
370 <tr>
371 <td valign="top"><a href="../www/command-line-options.html#coalesce">-coalesce</a></td>
372 <td valign="top">merge a sequence of images</td>
373 </tr>
374
375 <tr>
376 <td valign="top"><a href="../www/command-line-options.html#colorize">-colorize <em class="option">value</em></a></td>
377 <td valign="top">colorize the image with the fill color</td>
378 </tr>
379
380 <tr>
381 <td valign="top"><a href="../www/command-line-options.html#colors">-colors <em class="option">value</em></a></td>
382 <td valign="top">preferred number of colors in the image</td>
383 </tr>
384
385 <tr>
386 <td valign="top"><a href="../www/command-line-options.html#colorspace">-colorspace <em class="option">type</em></a></td>
387 <td valign="top">set image colorspace</td>
388 </tr>
389
390 <tr>
391 <td valign="top"><a href="../www/command-line-options.html#combine">-combine</a></td>
392 <td valign="top">combine a sequence of images</td>
393 </tr>
394
395 <tr>
396 <td valign="top"><a href="../www/command-line-options.html#comment">-comment <em class="option">string</em></a></td>
397 <td valign="top">annotate image with comment</td>
398 </tr>
399
400 <tr>
401 <td valign="top"><a href="../www/command-line-options.html#compose">-compose <em class="option">operator</em></a></td>
402 <td valign="top">set image composite operator</td>
403 </tr>
404
405 <tr>
406 <td valign="top"><a href="../www/command-line-options.html#composite">-composite</a></td>
407 <td valign="top">composite image</td>
408 </tr>
409
410 <tr>
411 <td valign="top"><a href="../www/command-line-options.html#compress">-compress <em class="option">type</em></a></td>
412 <td valign="top">image compression type</td>
413 </tr>
414
415 <tr>
416 <td valign="top"><a href="../www/command-line-options.html#contrast">-contrast</a></td>
417 <td valign="top">enhance or reduce the image contrast</td>
418 </tr>
419
420 <tr>
421 <td valign="top"><a href="../www/command-line-options.html#convolve">-convolve <em class="option">coefficients</em></a></td>
422 <td valign="top">apply a convolution kernel to the image</td>
423 </tr>
424
425 <tr>
426 <td valign="top"><a href="../www/command-line-options.html#crop">-crop <em class="option">geometry</em></a></td>
427 <td valign="top">crop the image</td>
428 </tr>
429
430 <tr>
431 <td valign="top"><a href="../www/command-line-options.html#cycle">-cycle <em class="option">amount</em></a></td>
432 <td valign="top">cycle the image colormap</td>
433 </tr>
434
435 <tr>
436 <td valign="top"><a href="../www/command-line-options.html#decipher">-decipher <em class="option">filename</em></a></td>
437 <td valign="top">convert cipher pixels to plain</td>
438 </tr>
439
440 <tr>
441 <td valign="top"><a href="../www/command-line-options.html#debug">-debug <em class="option">events</em></a></td>
442 <td valign="top">display copious debugging information</td>
443 </tr>
444
445 <tr>
446 <td valign="top"><a href="../www/command-line-options.html#define">-define <em class="option">format:option</em></a></td>
447 <td valign="top">define one or more image format options</td>
448 </tr>
449
450 <tr>
451 <td valign="top"><a href="../www/command-line-options.html#deconstruct">-deconstruct</a></td>
452 <td valign="top">break down an image sequence into constituent parts</td>
453 </tr>
454
455 <tr>
456 <td valign="top"><a href="../www/command-line-options.html#delay">-delay <em class="option">value</em></a></td>
457 <td valign="top">display the next image after pausing</td>
458 </tr>
459
460 <tr>
461 <td valign="top"><a href="../www/command-line-options.html#delete">-delete <em class="option">index</em></a></td>
462 <td valign="top">delete the image from the image sequence</td>
463 </tr>
464
465 <tr>
466 <td valign="top"><a href="../www/command-line-options.html#density">-density <em class="option">geometry</em></a></td>
467 <td valign="top">horizontal and vertical density of the image</td>
468 </tr>
469
470 <tr>
471 <td valign="top"><a href="../www/command-line-options.html#depth">-depth <em class="option">value</em></a></td>
472 <td valign="top">image depth</td>
473 </tr>
474
475 <tr>
476 <td valign="top"><a href="../www/command-line-options.html#despeckle">-despeckle</a></td>
477 <td valign="top">reduce the speckles within an image</td>
478 </tr>
479
480 <tr>
481 <td valign="top"><a href="../www/command-line-options.html#display">-display <em class="option">server</em></a></td>
482 <td valign="top">get image or font from this X server</td>
483 </tr>
484
485 <tr>
486 <td valign="top"><a href="../www/command-line-options.html#dispose">-dispose <em class="option">method</em></a></td>
487 <td valign="top">layer disposal method</td>
488 </tr>
489
490 <tr>
491 <td valign="top"><a href="../www/command-line-options.html#distort">-distort <em class="option">type coefficients</em></a></td>
492 <td valign="top">distort image</td>
493 </tr>
494
495 <tr>
496 <td valign="top"><a href="../www/command-line-options.html#dither">-dither <em class="option">method</em></a></td>
497 <td valign="top">apply error diffusion to image</td>
498 </tr>
499
500 <tr>
501 <td valign="top"><a href="../www/command-line-options.html#draw">-draw <em class="option">string</em></a></td>
502 <td valign="top">annotate the image with a graphic primitive</td>
503 </tr>
504
505 <tr>
506 <td valign="top"><a href="../www/command-line-options.html#edge">-edge <em class="option">radius</em></a></td>
507 <td valign="top">apply a filter to detect edges in the image</td>
508 </tr>
509
510 <tr>
511 <td valign="top"><a href="../www/command-line-options.html#emboss">-emboss <em class="option">radius</em></a></td>
512 <td valign="top">emboss an image</td>
513 </tr>
514
515 <tr>
516 <td valign="top"><a href="../www/command-line-options.html#encipher">-encipher <em class="option">filename</em></a></td>
517 <td valign="top">convert plain pixels to cipher pixels</td>
518 </tr>
519
520 <tr>
521 <td valign="top"><a href="../www/command-line-options.html#encoding">-encoding <em class="option">type</em></a></td>
522 <td valign="top">text encoding type</td>
523 </tr>
524
525 <tr>
526 <td valign="top"><a href="../www/command-line-options.html#endian">-endian <em class="option">type</em></a></td>
527 <td valign="top">endianness (MSB or LSB) of the image</td>
528 </tr>
529
530 <tr>
531 <td valign="top"><a href="../www/command-line-options.html#enhance">-enhance</a></td>
532 <td valign="top">apply a digital filter to enhance a noisy image</td>
533 </tr>
534
535 <tr>
536 <td valign="top"><a href="../www/command-line-options.html#equalize">-equalize</a></td>
537 <td valign="top">perform histogram equalization to an image</td>
538 </tr>
539
540 <tr>
541 <td valign="top"><a href="../www/command-line-options.html#evaluate">-evaluate <em class="option">operator value</em></a></td>
542 <td valign="top">evaluate an arithmetic, relational, or logical expression</td>
543 </tr>
544
545 <tr>
546 <td valign="top"><a href="../www/command-line-options.html#extent">-extent <em class="option">geometry</em></a></td>
547 <td valign="top">set the image size</td>
548 </tr>
549
550 <tr>
551 <td valign="top"><a href="../www/command-line-options.html#extract">-extract <em class="option">geometry</em></a></td>
552 <td valign="top">extract area from image</td>
553 </tr>
554
555 <tr>
556 <td valign="top"><a href="../www/command-line-options.html#family">-family <em class="option">name</em></a></td>
557 <td valign="top">render text with this font family</td>
558 </tr>
559
560 <tr>
561 <td valign="top"><a href="../www/command-line-options.html#fft">-fft</a></td>
562 <td valign="top">implments the discrete Fourier transform (DFT)</td>
563 </tr>
564
565 <tr>
566 <td valign="top"><a href="../www/command-line-options.html#fill">-fill <em class="option">color</em></a></td>
567 <td valign="top">color to use when filling a graphic primitive</td>
568 </tr>
569
570 <tr>
571 <td valign="top"><a href="../www/command-line-options.html#filter">-filter <em class="option">type</em></a></td>
572 <td valign="top">use this filter when resizing an image</td>
573 </tr>
574
575 <tr>
576 <td valign="top"><a href="../www/command-line-options.html#flatten">-flatten</a></td>
577 <td valign="top">flatten a sequence of images</td>
578 </tr>
579
580 <tr>
581 <td valign="top"><a href="../www/command-line-options.html#flip">-flip</a></td>
582 <td valign="top">flip image in the vertical direction</td>
583 </tr>
584
585 <tr>
586 <td valign="top"><a href="../www/command-line-options.html#floodfill">-floodfill <em class="option">geometry color</em></a></td>
587 <td valign="top">floodfill the image with color</td>
588 </tr>
589
590 <tr>
591 <td valign="top"><a href="../www/command-line-options.html#flop">-flop</a></td>
592 <td valign="top">flop image in the horizontal direction</td>
593 </tr>
594
595 <tr>
596 <td valign="top"><a href="../www/command-line-options.html#font">-font <em class="option">name</em></a></td>
597 <td valign="top">render text with this font</td>
598 </tr>
599
600 <tr>
601 <td valign="top"><a href="../www/command-line-options.html#format_identify_">-format <em class="option">string</em></a></td>
602 <td valign="top">output formatted image characteristics</td>
603 </tr>
604
605 <tr>
606 <td valign="top"><a href="../www/command-line-options.html#frame">-frame <em class="option">geometry</em></a></td>
607 <td valign="top">surround image with an ornamental border</td>
608 </tr>
609
610 <tr>
611 <td valign="top"><a href="../www/command-line-options.html#function">-function <em class="option">name</em></a></td>
612 <td valign="top">apply a function to the image</td>
613 </tr>
614
615 <tr>
616 <td valign="top"><a href="../www/command-line-options.html#fuzz">-fuzz <em class="option">distance</em></a></td>
617 <td valign="top">colors within this distance are considered equal</td>
618 </tr>
619
620 <tr>
621 <td valign="top"><a href="../www/command-line-options.html#fx">-fx <em class="option">expression</em></a></td>
622 <td valign="top">apply mathematical expression to an image channel(s)</td>
623 </tr>
624
625 <tr>
626 <td valign="top"><a href="../www/command-line-options.html#gamma">-gamma <em class="option">value</em></a></td>
627 <td valign="top">level of gamma correction</td>
628 </tr>
629
630 <tr>
631 <td valign="top"><a href="../www/command-line-options.html#gaussian">-gaussian <em class="option">geometry</em></a></td>
632 <td valign="top">reduce image noise and reduce detail levels</td>
633 </tr>
634
635 <tr>
636 <td valign="top"><a href="../www/command-line-options.html#geometry">-geometry <em class="option">geometry</em></a></td>
637 <td valign="top">preferred size or location of the image</td>
638 </tr>
639
640 <tr>
641 <td valign="top"><a href="../www/command-line-options.html#gravity">-gravity <em class="option">type</em></a></td>
642 <td valign="top">horizontal and vertical text placement</td>
643 </tr>
644
645 <tr>
646 <td valign="top"><a href="../www/command-line-options.html#green-primary">-green-primary <em class="option">point</em></a></td>
647 <td valign="top">chromaticity green primary point</td>
648 </tr>
649
650 <tr>
651 <td valign="top"><a href="../www/command-line-options.html#help">-help</a></td>
652 <td valign="top">print program options</td>
653 </tr>
654
655 <tr>
656 <td valign="top"><a href="../www/command-line-options.html#identify">-identify</a></td>
657 <td valign="top">identify the format and characteristics of the image</td>
658 </tr>
659
660 <tr>
661 <td valign="top"><a href="../www/command-line-options.html#ift">-ift</a></td>
662 <td valign="top">implements the inverse discrete Fourier transform (DFT)</td>
663 </tr>
664
665 <tr>
666 <td valign="top"><a href="../www/command-line-options.html#implode">-implode <em class="option">amount</em></a></td>
667 <td valign="top">implode image pixels about the center</td>
668 </tr>
669
670 <tr>
671 <td valign="top"><a href="../www/command-line-options.html#insert">-insert <em class="option">index</em></a></td>
672 <td valign="top">insert last image into the image sequence</td>
673 </tr>
674
675 <tr>
676 <td valign="top"><a href="../www/command-line-options.html#intent">-intent <em class="option">type</em></a></td>
677 <td valign="top">type of rendering intent when managing the image color</td>
678 </tr>
679
680 <tr>
681 <td valign="top"><a href="../www/command-line-options.html#interlace">-interlace <em class="option">type</em></a></td>
682 <td valign="top">type of image interlacing scheme</td>
683 </tr>
684
685 <tr>
686 <td valign="top"><a href="../www/command-line-options.html#interpolate">-interpolate <em class="option">method</em></a></td>
687 <td valign="top">pixel color interpolation method</td>
688 </tr>
689
690 <tr>
691 <td valign="top"><a href="../www/command-line-options.html#interword-spacing">-interword-spacing <em class="option">value</em></a></td>
692 <td valign="top">the space between two words</td>
693 </tr>
694
695 <tr>
696 <td valign="top"><a href="../www/command-line-options.html#kerning">-kerning <em class="option">value</em></a></td>
697 <td valign="top">the space between two characters</td>
698 </tr>
699
700 <tr>
701 <td valign="top"><a href="../www/command-line-options.html#label">-label <em class="option">string</em></a></td>
702 <td valign="top">assign a label to an image</td>
703 </tr>
704
705 <tr>
706 <td valign="top"><a href="../www/command-line-options.html#lat">-lat <em class="option">geometry</em></a></td>
707 <td valign="top">local adaptive thresholding</td>
708 </tr>
709
710 <tr>
711 <td valign="top"><a href="../www/command-line-options.html#layers">-layers <em class="option">method</em></a></td>
712 <td valign="top">optimize or compare image layers</td>
713 </tr>
714
715 <tr>
716 <td valign="top"><a href="../www/command-line-options.html#level">-level <em class="option">value</em></a></td>
717 <td valign="top">adjust the level of image contrast</td>
718 </tr>
719
720 <tr>
721 <td valign="top"><a href="../www/command-line-options.html#limit">-limit <em class="option">type value</em></a></td>
722 <td valign="top">pixel cache resource limit</td>
723 </tr>
724
725 <tr>
726 <td valign="top"><a href="../www/command-line-options.html#linear-stretch">-linear-stretch <em class="option">geometry</em></a></td>
727 <td valign="top">linear with saturation histogram stretch</td>
728 </tr>
729
730 <tr>
731 <td valign="top"><a href="../www/command-line-options.html#liquid-rescale">-liquid-rescale <em class="option">geometry</em></a></td>
732 <td valign="top">rescale image with seam-carving</td>
733 </tr>
734
735 <tr>
736 <td valign="top"><a href="../www/command-line-options.html#log">-log <em class="option">format</em></a></td>
737 <td valign="top">format of debugging information</td>
738 </tr>
739
740 <tr>
741 <td valign="top"><a href="../www/command-line-options.html#loop">-loop <em class="option">iterations</em></a></td>
742 <td valign="top">add Netscape loop extension to your GIF animation</td>
743 </tr>
744
745 <tr>
746 <td valign="top"><a href="../www/command-line-options.html#mask">-mask <em class="option">filename</em></a></td>
747 <td valign="top">associate a mask with the image</td>
748 </tr>
749
750 <tr>
751 <td valign="top"><a href="../www/command-line-options.html#mattecolor">-mattecolor <em class="option">color</em></a></td>
752 <td valign="top">frame color</td>
753 </tr>
754
755 <tr>
756 <td valign="top"><a href="../www/command-line-options.html#median">-median <em class="option">radius</em></a></td>
757 <td valign="top">apply a median filter to the image</td>
758 </tr>
759
760 <tr>
761 <td valign="top"><a href="../www/command-line-options.html#modulate">-modulate <em class="option">value</em></a></td>
762 <td valign="top">vary the brightness, saturation, and hue</td>
763 </tr>
764
765 <tr>
766 <td valign="top"><a href="../www/command-line-options.html#monitor">-monitor</a></td>
767 <td valign="top">monitor progress</td>
768 </tr>
769
770 <tr>
771 <td valign="top"><a href="../www/command-line-options.html#monochrome">-monochrome</a></td>
772 <td valign="top">transform image to black and white</td>
773 </tr>
774
775 <tr>
776 <td valign="top"><a href="../www/command-line-options.html#morph">-morph <em class="option">value</em></a></td>
777 <td valign="top">morph an image sequence</td>
778 </tr>
779
780 <tr>
781 <td valign="top"><a href="../www/command-line-options.html#motion-blur">-motion-blur <em class="option">geometry</em></a></td>
782 <td valign="top">simulate motion blur</td>
783 </tr>
784
785 <tr>
786 <td valign="top"><a href="../www/command-line-options.html#negate">-negate</a></td>
787 <td valign="top">replace every pixel with its complementary color </td>
788 </tr>
789
790 <tr>
791 <td valign="top"><a href="../www/command-line-options.html#noise">-noise <em class="option">radius</em></a></td>
792 <td valign="top">add or reduce noise in an image</td>
793 </tr>
794
795 <tr>
796 <td valign="top"><a href="../www/command-line-options.html#normalize">-normalize</a></td>
797 <td valign="top">transform image to span the full range of colors</td>
798 </tr>
799
800 <tr>
801 <td valign="top"><a href="../www/command-line-options.html#opaque">-opaque <em class="option">color</em></a></td>
802 <td valign="top">change this color to the fill color</td>
803 </tr>
804
805 <tr>
806 <td valign="top"><a href="../www/command-line-options.html#ordered-dither">-ordered-dither <em class="option">NxN</em></a></td>
807 <td valign="top">ordered dither the image</td>
808 </tr>
809
810 <tr>
811 <td valign="top"><a href="../www/command-line-options.html#orient">-orient <em class="option">type</em></a></td>
812 <td valign="top">image orientation</td>
813 </tr>
814
815 <tr>
816 <td valign="top"><a href="../www/command-line-options.html#page">-page <em class="option">geometry</em></a></td>
817 <td valign="top">size and location of an image canvas (setting)</td>
818 </tr>
819
820 <tr>
821 <td valign="top"><a href="../www/command-line-options.html#paint">-paint <em class="option">radius</em></a></td>
822 <td valign="top">simulate an oil painting</td>
823 </tr>
824
825 <tr>
826 <td valign="top"><a href="../www/command-line-options.html#ping">-ping</a></td>
827 <td valign="top">efficiently determine image attributes</td>
828 </tr>
829
830 <tr>
831 <td valign="top"><a href="../www/command-line-options.html#pointsize">-pointsize <em class="option">value</em></a></td>
832 <td valign="top">font point size</td>
833 </tr>
834
835 <tr>
836 <td valign="top"><a href="../www/command-line-options.html#polaroid">-polaroid <em class="option">angle</em></a></td>
837 <td valign="top">simulate a Polaroid picture</td>
838 </tr>
839
840 <tr>
841 <td valign="top"><a href="../www/command-line-options.html#posterize">-posterize <em class="option">levels</em></a></td>
842 <td valign="top">reduce the image to a limited number of color levels</td>
843 </tr>
844
845 <tr>
846 <td valign="top"><a href="../www/command-line-options.html#preview">-preview <em class="option">type</em></a></td>
847 <td valign="top">image preview type</td>
848 </tr>
849
850 <tr>
851 <td valign="top"><a href="../www/command-line-options.html#print">-print <em class="option">string</em></a></td>
852 <td valign="top">interpret string and print to console</td>
853 </tr>
854
855 <tr>
856 <td valign="top"><a href="../www/command-line-options.html#process">-process <em class="option">image-filter</em></a></td>
857 <td valign="top">process the image with a custom image filter</td>
858 </tr>
859
860 <tr>
861 <td valign="top"><a href="../www/command-line-options.html#profile">-profile <em class="option">filename</em></a></td>
862 <td valign="top">add, delete, or apply an image profile</td>
863 </tr>
864
865 <tr>
866 <td valign="top"><a href="../www/command-line-options.html#quality">-quality <em class="option">value</em></a></td>
867 <td valign="top">JPEG/MIFF/PNG compression level</td>
868 </tr>
869
870 <tr>
871 <td valign="top"><a href="../www/command-line-options.html#quantize">-quantize <em class="option">colorspace</em></a></td>
872 <td valign="top">reduce image colors in this colorspace</td>
873 </tr>
874
875 <tr>
876 <td valign="top"><a href="../www/command-line-options.html#quiet">-quiet</a></td>
877 <td valign="top">suppress all warning messages</td>
878 </tr>
879
880 <tr>
881 <td valign="top"><a href="../www/command-line-options.html#radial-blur">-radial-blur <em class="option">angle</em></a></td>
882 <td valign="top">radial blur the image</td>
883 </tr>
884
885 <tr>
886 <td valign="top"><a href="../www/command-line-options.html#raise">-raise <em class="option">value</em></a></td>
887 <td valign="top">lighten/darken image edges to create a 3-D effect</td>
888 </tr>
889
890 <tr>
891 <td valign="top"><a href="../www/command-line-options.html#random-threshold">-random-threshold <em class="option">low,high</em></a></td>
892 <td valign="top">random threshold the image</td>
893 </tr>
894
895 <tr>
896 <td valign="top"><a href="../www/command-line-options.html#recolor">-recolor <em class="option">matrix</em></a></td>
897 <td valign="top">translate, scale, shear, or rotate image colors.</td>
898 </tr>
899
900 <tr>
901 <td valign="top"><a href="../www/command-line-options.html#red-primary">-red-primary <em class="option">point</em></a></td>
902 <td valign="top">chromaticity red primary point</td>
903 </tr>
904
905 <tr>
906 <td valign="top"><a href="../www/command-line-options.html#regard-warnings">-regard-warnings</a></td>
907 <td valign="top">pay attention to warning messages.</td>
908 </tr>
909
910 <tr>
911 <td valign="top"><a href="../www/command-line-options.html#region">-region <em class="option">geometry</em></a></td>
912 <td valign="top">apply options to a portion of the image</td>
913 </tr>
914
915 <tr>
916 <td valign="top"><a href="../www/command-line-options.html#remap">-remap <em class="option">filename</em></a></td>
917 <td valign="top">transform image colors to match this set of colors</td>
918 </tr>
919
920 <tr>
921 <td valign="top"><a href="../www/command-line-options.html#render">-render</a></td>
922 <td valign="top">render vector graphics</td>
923 </tr>
924
925 <tr>
926 <td valign="top"><a href="../www/command-line-options.html#repage">-repage <em class="option">geometry</em></a></td>
927 <td valign="top">size and location of an image canvas</td>
928 </tr>
929
930 <tr>
931 <td valign="top"><a href="../www/command-line-options.html#resample">-resample <em class="option">geometry</em></a></td>
932 <td valign="top">change the resolution of an image</td>
933 </tr>
934
935 <tr>
936 <td valign="top"><a href="../www/command-line-options.html#resize">-resize <em class="option">geometry</em></a></td>
937 <td valign="top">resize the image</td>
938 </tr>
939
940 <tr>
941 <td valign="top"><a href="../www/command-line-options.html#respect-parentheses">-respect-parentheses</a></td>
942 <td valign="top">settings remain in effect until parenthesis boundary.</td>
943 </tr>
944
945 <tr>
946 <td valign="top"><a href="../www/command-line-options.html#roll">-roll <em class="option">geometry</em></a></td>
947 <td valign="top">roll an image vertically or horizontally</td>
948 </tr>
949
950 <tr>
951 <td valign="top"><a href="../www/command-line-options.html#rotate">-rotate <em class="option">degrees</em></a></td>
952 <td valign="top">apply Paeth rotation to the image</td>
953 </tr>
954
955 <tr>
956 <td valign="top"><a href="../www/command-line-options.html#sample">-sample <em class="option">geometry</em></a></td>
957 <td valign="top">scale image with pixel sampling</td>
958 </tr>
959
960 <tr>
961 <td valign="top"><a href="../www/command-line-options.html#sampling-factor">-sampling-factor <em class="option">geometry</em></a></td>
962 <td valign="top">horizontal and vertical sampling factor</td>
963 </tr>
964
965 <tr>
966 <td valign="top"><a href="../www/command-line-options.html#scale">-scale <em class="option">geometry</em></a></td>
967 <td valign="top">scale the image</td>
968 </tr>
969
970 <tr>
971 <td valign="top"><a href="../www/command-line-options.html#scene">-scene <em class="option">value</em></a></td>
972 <td valign="top">image scene number</td>
973 </tr>
974
975 <tr>
976 <td valign="top"><a href="../www/command-line-options.html#seed">-seed <em class="option">value</em></a></td>
977 <td valign="top">seed a new sequence of pseudo-random numbers</td>
978 </tr>
979
980 <tr>
981 <td valign="top"><a href="../www/command-line-options.html#segment">-segment <em class="option">values</em></a></td>
982 <td valign="top">segment an image</td>
983 </tr>
984
985 <tr>
986 <td valign="top"><a href="../www/command-line-options.html#threshold">-selective-blur <em class="option">geometry</em></a></td>
987 <td valign="top">selectively blur pixels within a contrast threshold</td>
988 </tr>
989
990 <tr>
991 <td valign="top"><a href="../www/command-line-options.html#separate">-separate</a></td>
992 <td valign="top">separate an image channel into a grayscale image</td>
993 </tr>
994
995 <tr>
996 <td valign="top"><a href="../www/command-line-options.html#sepia-tone">-sepia-tone <em class="option">threshold</em></a></td>
997 <td valign="top">simulate a sepia-toned photo</td>
998 </tr>
999
1000 <tr>
1001 <td valign="top"><a href="../www/command-line-options.html#set">-set <em class="option">attribute value</em></a></td>
1002 <td valign="top">set an image attribute</td>
1003 </tr>
1004
1005 <tr>
1006 <td valign="top"><a href="../www/command-line-options.html#shade">-shade <em class="option">degrees</em></a></td>
1007 <td valign="top">shade the image using a distant light source</td>
1008 </tr>
1009
1010 <tr>
1011 <td valign="top"><a href="../www/command-line-options.html#shadow">-shadow <em class="option">geometry</em></a></td>
1012 <td valign="top">simulate an image shadow</td>
1013 </tr>
1014
1015 <tr>
1016 <td valign="top"><a href="../www/command-line-options.html#sharpen">-sharpen <em class="option">geometry</em></a></td>
1017 <td valign="top">sharpen the image</td>
1018 </tr>
1019
1020 <tr>
1021 <td valign="top"><a href="../www/command-line-options.html#shave">-shave <em class="option">geometry</em></a></td>
1022 <td valign="top">shave pixels from the image edges</td>
1023 </tr>
1024
1025 <tr>
1026 <td valign="top"><a href="../www/command-line-options.html#shear">-shear <em class="option">geometry</em></a></td>
1027 <td valign="top">slide one edge of the image along the X or Y axis</td>
1028 </tr>
1029
1030 <tr>
1031 <td valign="top"><a href="../www/command-line-options.html#sigmoidal">-sigmoidal-contrast <em class="option">geometry</em></a></td>
1032 <td valign="top">increase the contrast without saturating highlights or shadows</td>
1033 </tr>
1034
1035 <tr>
1036 <td valign="top"><a href="../www/command-line-options.html#size">-size <em class="option">geometry</em></a></td>
1037 <td valign="top">width and height of image</td>
1038 </tr>
1039
1040 <tr>
1041 <td valign="top"><a href="../www/command-line-options.html#sketch">-sketch <em class="option">geometry</em></a></td>
1042 <td valign="top">simulate a pencil sketch</td>
1043 </tr>
1044
1045 <tr>
1046 <td valign="top"><a href="../www/command-line-options.html#solarize">-solarize <em class="option">threshold</em></a></td>
1047 <td valign="top">negate all pixels above the threshold level</td>
1048 </tr>
1049
1050 <tr>
1051 <td valign="top"><a href="../www/command-line-options.html#splice">-splice <em class="option">geometry</em></a></td>
1052 <td valign="top">splice the background color into the image</td>
1053 </tr>
1054
1055 <tr>
1056 <td valign="top"><a href="../www/command-line-options.html#spread">-spread <em class="option">radius</em></a></td>
1057 <td valign="top">displace image pixels by a random amount</td>
1058 </tr>
1059
1060 <tr>
1061 <td valign="top"><a href="../www/command-line-options.html#strip">-strip</a></td>
1062 <td valign="top">strip image of all profiles and comments</td>
1063 </tr>
1064
1065 <tr>
1066 <td valign="top"><a href="../www/command-line-options.html#stroke">-stroke <em class="option">color</em></a></td>
1067 <td valign="top">graphic primitive stroke color</td>
1068 </tr>
1069
1070 <tr>
1071 <td valign="top"><a href="../www/command-line-options.html#strokewidth">-strokewidth <em class="option">value</em></a></td>
1072 <td valign="top">graphic primitive stroke width</td>
1073 </tr>
1074
1075 <tr>
1076 <td valign="top"><a href="../www/command-line-options.html#stretch">-stretch <em class="option">type</em></a></td>
1077 <td valign="top">render text with this font stretch</td>
1078 </tr>
1079
1080 <tr>
1081 <td valign="top"><a href="../www/command-line-options.html#style">-style <em class="option">type</em></a></td>
1082 <td valign="top">render text with this font style</td>
1083 </tr>
1084
1085 <tr>
1086 <td valign="top"><a href="../www/command-line-options.html#swap">-swap <em class="option">indexes</em></a></td>
1087 <td valign="top">swap two images in the image sequence</td>
1088 </tr>
1089
1090 <tr>
1091 <td valign="top"><a href="../www/command-line-options.html#swirl">-swirl <em class="option">degrees</em></a></td>
1092 <td valign="top">swirl image pixels about the center</td>
1093 </tr>
1094
1095 <tr>
1096 <td valign="top"><a href="../www/command-line-options.html#texture">-texture <em class="option">filename</em></a></td>
1097 <td valign="top">name of texture to tile onto the image background</td>
1098 </tr>
1099
1100 <tr>
1101 <td valign="top"><a href="../www/command-line-options.html#threshold">-threshold <em class="option">value</em></a></td>
1102 <td valign="top">threshold the image</td>
1103 </tr>
1104
1105 <tr>
1106 <td valign="top"><a href="../www/command-line-options.html#thumbnail">-thumbnail <em class="option">geometry</em></a></td>
1107 <td valign="top">create a thumbnail of the image</td>
1108 </tr>
1109
1110 <tr>
1111 <td valign="top"><a href="../www/command-line-options.html#tile">-tile <em class="option">filename</em></a></td>
1112 <td valign="top">tile image when filling a graphic primitive</td>
1113 </tr>
1114
1115 <tr>
1116 <td valign="top"><a href="../www/command-line-options.html#tile-offset">-tile-offset <em class="option">geometry</em></a></td>
1117 <td valign="top">set the image tile offset</td>
1118 </tr>
1119
1120 <tr>
1121 <td valign="top"><a href="../www/command-line-options.html#tint">-tint <em class="option">value</em></a></td>
1122 <td valign="top">tint the image with the fill color</td>
1123 </tr>
1124
1125 <tr>
1126 <td valign="top"><a href="../www/command-line-options.html#transform">-transform</a></td>
1127 <td valign="top">affine transform image</td>
1128 </tr>
1129
1130 <tr>
1131 <td valign="top"><a href="../www/command-line-options.html#transparent">-transparent <em class="option">color</em></a></td>
1132 <td valign="top">make this color transparent within the image</td>
1133 </tr>
1134
1135 <tr>
1136 <td valign="top"><a href="../www/command-line-options.html#transparent-color">-transparent-color <em class="option">color</em></a></td>
1137 <td valign="top">transparent color</td>
1138 </tr>
1139
1140 <tr>
1141 <td valign="top"><a href="../www/command-line-options.html#transpose">-transpose</a></td>
1142 <td valign="top">flip image in the vertical direction and rotate 90 degrees</td>
1143 </tr>
1144
1145 <tr>
1146 <td valign="top"><a href="../www/command-line-options.html#transverse">-transverse</a></td>
1147 <td valign="top">flop image in the horizontal direction and rotate 270 degrees</td>
1148 </tr>
1149
1150 <tr>
1151 <td valign="top"><a href="../www/command-line-options.html#treedepth">-treedepth <em class="option">value</em></a></td>
1152 <td valign="top">color tree depth</td>
1153 </tr>
1154
1155 <tr>
1156 <td valign="top"><a href="../www/command-line-options.html#trim">-trim</a></td>
1157 <td valign="top">trim image edges</td>
1158 </tr>
1159
1160 <tr>
1161 <td valign="top"><a href="../www/command-line-options.html#type">-type <em class="option">type</em></a></td>
1162 <td valign="top">image type</td>
1163 </tr>
1164
1165 <tr>
1166 <td valign="top"><a href="../www/command-line-options.html#undercolor">-undercolor <em class="option">color</em></a></td>
1167 <td valign="top">annotation bounding box color</td>
1168 </tr>
1169
1170 <tr>
1171 <td valign="top"><a href="../www/command-line-options.html#unique-colors">-unique-colors</a></td>
1172 <td valign="top">discard all but one of any pixel color.</td>
1173 </tr>
1174
1175 <tr>
1176 <td valign="top"><a href="../www/command-line-options.html#units">-units <em class="option">type</em></a></td>
1177 <td valign="top">the units of image resolution</td>
1178 </tr>
1179
1180 <tr>
1181 <td valign="top"><a href="../www/command-line-options.html#unsharp">-unsharp <em class="option">geometry</em></a></td>
1182 <td valign="top">sharpen the image</td>
1183 </tr>
1184
1185 <tr>
1186 <td valign="top"><a href="../www/command-line-options.html#verbose">-verbose</a></td>
1187 <td valign="top">print detailed information about the image</td>
1188 </tr>
1189
1190 <tr>
1191 <td valign="top"><a href="../www/command-line-options.html#version">-version</a></td>
1192 <td valign="top">print version information</td>
1193 </tr>
1194
1195 <tr>
1196 <td valign="top"><a href="../www/command-line-options.html#view">-view</a></td>
1197 <td valign="top">FlashPix viewing transforms</td>
1198 </tr>
1199
1200 <tr>
1201 <td valign="top"><a href="../www/command-line-options.html#vignette">-vignette <em class="option">geometry</em></a></td>
1202 <td valign="top">soften the edges of the image in vignette style</td>
1203 </tr>
1204
1205 <tr>
1206 <td valign="top"><a href="../www/command-line-options.html#virtual-pixel">-virtual-pixel <em class="option">method</em></a></td>
1207 <td valign="top">access method for pixels outside the boundaries of the image</td>
1208 </tr>
1209
1210 <tr>
1211 <td valign="top"><a href="../www/command-line-options.html#wave">-wave <em class="option">geometry</em></a></td>
1212 <td valign="top">alter an image along a sine wave</td>
1213 </tr>
1214
1215 <tr>
1216 <td valign="top"><a href="../www/command-line-options.html#weight">-weight <em class="option">type</em></a></td>
1217 <td valign="top">render text with this font weight</td>
1218 </tr>
1219
1220 <tr>
1221 <td valign="top"><a href="../www/command-line-options.html#white-point">-white-point <em class="option">point</em></a></td>
1222 <td valign="top">chromaticity white point</td>
1223 </tr>
1224
1225 <tr>
1226 <td valign="top"><a href="../www/command-line-options.html#white-threshold">-white-threshold <em class="option">value</em></a></td>
1227 <td valign="top">force all pixels above the threshold into white</td>
1228 </tr>
1229
1230 <tr>
1231 <td valign="top"><a href="../www/command-line-options.html#write">-write <em class="option">filename</em></a></td>
1232 <td valign="top">write images to this file</td>
1233 </tr>
1234
1235 </tbody>
1236</table>
1237
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