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cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]218<h1>ImageMagick Stream Command-line Tool</h1>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]219<p class="navigation-index">[<a href="#usage">Example Usage</a> &bull; <a href="#options">Option Summary</a>]</p>
220
221<div class="doc-section">
222<p><kbd>Stream</kbd> is a lightweight tool to stream one or more pixel components of the image or portion of the image to your choice of storage formats. It writes the pixel components as they are read from the input image a row at a time making <kbd>stream</kbd> desirable when working with large images or when you require raw pixel components.</p>
223</div>
224
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]225<h2><a id="usage"></a>Example Usage</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]226<div class="doc-section">
227
228<p>We list a few examples of the <kbd>stream</kbd> command here to illustrate its usefulness and ease of use. To get started, lets stream the red, green, blue components of a 640x480 JPEG image to disk as unsigned characters:</p>
229
230<p class='crt'><span class="crtprompt"> $magick&gt; </span><span class='crtin'>stream -map rgb -storage-type char image.jpg pixels.dat</span><span class='crtout'></span><span class="crtprompt"> $magick&gt; </span><span class='crtin'>display -depth 8 -size 640x480 rgb:pixels.dat</span></p>
231<p>Here we extract a 100x100 region from a TIFF image in the grayscale format as doubles:</p>
232
233<p class='crt'><span class="crtprompt"> $magick&gt; </span><span class='crtin'>stream -map i -storage-type double -extract 100x100+30+40 image.tif gray.raw</span></p>
234<p>You can also associate the region to extract with the image filename:</p>
235
236<p class='crt'><span class="crtprompt"> $magick&gt; </span><span class='crtin'>stream -map i -storage-type double 'image.tif[100x100+30+40]' gray.raw</span></p>
237</div>
238
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]239<h2><a id="options"></a>Option Summary</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]240<div class="doc-section">
241
242<p>The <kbd>stream</kbd> command recognizes these options. Click on an option to get more details about how that option works.</p>
243
244<table class="doc">
245 <tbody>
246 <tr>
247 <th align="left">Option</th>
248 <th align="left">Description</th>
249 </tr>
250
251 <tr>
252 <td valign="top"><a href="../www/command-line-options.html#authenticate">-authenticate <em class="option">value</em></a></td>
253 <td valign="top">decrypt image with this password</td>
254 </tr>
255
256 <tr>
257 <td valign="top"><a href="../www/command-line-options.html#channel">-channel <em class="option">type</em></a></td>
258 <td valign="top">apply option to select image channels</td>
259 </tr>
260
261 <tr>
262 <td valign="top"><a href="../www/command-line-options.html#colorspace">-colorspace <em class="option">type</em></a></td>
263 <td valign="top">set image colorspace</td>
264 </tr>
265
266 <tr>
267 <td valign="top"><a href="../www/command-line-options.html#debug">-debug <em class="option">events</em></a></td>
268 <td valign="top">display copious debugging information</td>
269 </tr>
270
271 <tr>
272 <td valign="top"><a href="../www/command-line-options.html#define">-define <em class="option">format:option</em></a></td>
273 <td valign="top">define one or more image format options</td>
274 </tr>
275
276 <tr>
277 <td valign="top"><a href="../www/command-line-options.html#density">-density <em class="option">geometry</em></a></td>
278 <td valign="top">horizontal and vertical density of the image</td>
279 </tr>
280
281 <tr>
282 <td valign="top"><a href="../www/command-line-options.html#depth">-depth <em class="option">value</em></a></td>
283 <td valign="top">image depth</td>
284 </tr>
285
286 <tr>
287 <td valign="top"><a href="../www/command-line-options.html#extract">-extract <em class="option">geometry</em></a></td>
288 <td valign="top">extract area from image</td>
289 </tr>
290
291 <tr>
292 <td valign="top"><a href="../www/command-line-options.html#help">-help</a></td>
293 <td valign="top">print program options</td>
294 </tr>
295
296 <tr>
297 <td valign="top"><a href="../www/command-line-options.html#interlace">-interlace <em class="option">type</em></a></td>
298 <td valign="top">type of image interlacing scheme</td>
299 </tr>
300
301 <tr>
302 <td valign="top"><a href="../www/command-line-options.html#interpolate">-interpolate <em class="option">method</em></a></td>
303 <td valign="top">pixel color interpolation method</td>
304 </tr>
305
306 <tr>
307 <td valign="top"><a href="../www/command-line-options.html#limit">-limit <em class="option">type value</em></a></td>
308 <td valign="top">pixel cache resource limit</td>
309 </tr>
310
311 <tr>
312 <td valign="top"><a href="../www/command-line-options.html#list">-list <em class="option">type</em></a></td>
313 <td valign="top">Color, Configure, Delegate, Format, Magic, Module, Resource, or Type</td>
314 </tr>
315
316 <tr>
317 <td valign="top"><a href="../www/command-line-options.html#log">-log <em class="option">format</em></a></td>
318 <td valign="top">format of debugging information</td>
319 </tr>
320
321 <tr>
322 <td valign="top"><a href="../www/command-line-options.html#stream-map">-map <em class="option">components</em></a></td>
323 <td valign="top">store pixels in this format.</td>
324 </tr>
325
326 <tr>
327 <td valign="top"><a href="../www/command-line-options.html#monitor">-monitor</a></td>
328 <td valign="top">monitor progress</td>
329 </tr>
330
331 <tr>
332 <td valign="top"><a href="../www/command-line-options.html#quantize">-quantize <em class="option">colorspace</em></a></td>
333 <td valign="top">reduce image colors in this colorspace</td>
334 </tr>
335
336 <tr>
337 <td valign="top"><a href="../www/command-line-options.html#quiet">-quiet</a></td>
338 <td valign="top">suppress all warning messages</td>
339 </tr>
340
341 <tr>
342 <td valign="top"><a href="../www/command-line-options.html#regard-warnings">-regard-warnings</a></td>
343 <td valign="top">pay attention to warning messages.</td>
344 </tr>
345
346 <tr>
347 <td valign="top"><a href="../www/command-line-options.html#respect-parentheses">-respect-parentheses</a></td>
348 <td valign="top">settings remain in effect until parenthesis boundary.</td>
349 </tr>
350
351 <tr>
352 <td valign="top"><a href="../www/command-line-options.html#sampling-factor">-sampling-factor <em class="option">geometry</em></a></td>
353 <td valign="top">horizontal and vertical sampling factor</td>
354 </tr>
355
356 <tr>
357 <td valign="top"><a href="../www/command-line-options.html#seed">-seed <em class="option">value</em></a></td>
358 <td valign="top">seed a new sequence of pseudo-random numbers</td>
359 </tr>
360
361 <tr>
362 <td valign="top"><a href="../www/command-line-options.html#set">-set <em class="option">attribute value</em></a></td>
363 <td valign="top">set an image attribute</td>
364 </tr>
365
366 <tr>
367 <td valign="top"><a href="../www/command-line-options.html#size">-size <em class="option">geometry</em></a></td>
368 <td valign="top">width and height of image</td>
369 </tr>
370
371 <tr>
372 <td valign="top"><a href="../www/command-line-options.html#storage-type">-storage-type <em class="option">type</em></a></td>
373 <td valign="top">store pixels with this storage type.</td>
374 </tr>
375
376 <tr>
cristy5063d812010-10-19 16:28:10 +0000[diff] [blame]377 <td valign="top"><a href="../www/command-line-options.html#synchronize">-synchronize</a></td>
378 <td valign="top">synchronize image to storage device</td>
379 </tr>
380
381 <tr>
382 <td valign="top"><a href="../www/command-line-options.html#taint">-taint</a></td>
383 <td valign="top">mark the image as modified</td>
384 </tr>
385
386 <tr>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]387 <td valign="top"><a href="../www/command-line-options.html#transparent-color">-transparent-color <em class="option">color</em></a></td>
388 <td valign="top">transparent color</td>
389 </tr>
390
391 <tr>
392 <td valign="top"><a href="../www/command-line-options.html#verbose">-verbose</a></td>
393 <td valign="top">print detailed information about the image</td>
394 </tr>
395
396 <tr>
397 <td valign="top"><a href="../www/command-line-options.html#version">-version</a></td>
398 <td valign="top">print version information</td>
399 </tr>
400
401 <tr>
402 <td valign="top"><a href="../www/command-line-options.html#virtual-pixel">-virtual-pixel <em class="option">method</em></a></td>
403 <td valign="top">access method for pixels outside the boundaries of the image</td>
404 </tr>
405
406 </tbody>
407</table>
408
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