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cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]219<h1>ImageMagick Stream Command-line Tool</h1>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]220<p class="navigation-index">[<a href="#usage">Example Usage</a> &bull; <a href="#options">Option Summary</a>]</p>
221
222<div class="doc-section">
223<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>
224</div>
225
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]226<h2><a id="usage"></a>Example Usage</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]227<div class="doc-section">
228
229<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>
230
231<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>
232<p>Here we extract a 100x100 region from a TIFF image in the grayscale format as doubles:</p>
233
234<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>
235<p>You can also associate the region to extract with the image filename:</p>
236
237<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>
238</div>
239
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]240<h2><a id="options"></a>Option Summary</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]241<div class="doc-section">
242
243<p>The <kbd>stream</kbd> command recognizes these options. Click on an option to get more details about how that option works.</p>
244
245<table class="doc">
246 <tbody>
247 <tr>
248 <th align="left">Option</th>
249 <th align="left">Description</th>
250 </tr>
251
252 <tr>
253 <td valign="top"><a href="../www/command-line-options.html#authenticate">-authenticate <em class="option">value</em></a></td>
254 <td valign="top">decrypt image with this password</td>
255 </tr>
256
257 <tr>
258 <td valign="top"><a href="../www/command-line-options.html#channel">-channel <em class="option">type</em></a></td>
259 <td valign="top">apply option to select image channels</td>
260 </tr>
261
262 <tr>
263 <td valign="top"><a href="../www/command-line-options.html#colorspace">-colorspace <em class="option">type</em></a></td>
264 <td valign="top">set image colorspace</td>
265 </tr>
266
267 <tr>
268 <td valign="top"><a href="../www/command-line-options.html#debug">-debug <em class="option">events</em></a></td>
269 <td valign="top">display copious debugging information</td>
270 </tr>
271
272 <tr>
273 <td valign="top"><a href="../www/command-line-options.html#define">-define <em class="option">format:option</em></a></td>
274 <td valign="top">define one or more image format options</td>
275 </tr>
276
277 <tr>
278 <td valign="top"><a href="../www/command-line-options.html#density">-density <em class="option">geometry</em></a></td>
279 <td valign="top">horizontal and vertical density of the image</td>
280 </tr>
281
282 <tr>
283 <td valign="top"><a href="../www/command-line-options.html#depth">-depth <em class="option">value</em></a></td>
284 <td valign="top">image depth</td>
285 </tr>
286
287 <tr>
288 <td valign="top"><a href="../www/command-line-options.html#extract">-extract <em class="option">geometry</em></a></td>
289 <td valign="top">extract area from image</td>
290 </tr>
291
292 <tr>
293 <td valign="top"><a href="../www/command-line-options.html#help">-help</a></td>
294 <td valign="top">print program options</td>
295 </tr>
296
297 <tr>
298 <td valign="top"><a href="../www/command-line-options.html#interlace">-interlace <em class="option">type</em></a></td>
299 <td valign="top">type of image interlacing scheme</td>
300 </tr>
301
302 <tr>
303 <td valign="top"><a href="../www/command-line-options.html#interpolate">-interpolate <em class="option">method</em></a></td>
304 <td valign="top">pixel color interpolation method</td>
305 </tr>
306
307 <tr>
308 <td valign="top"><a href="../www/command-line-options.html#limit">-limit <em class="option">type value</em></a></td>
309 <td valign="top">pixel cache resource limit</td>
310 </tr>
311
312 <tr>
313 <td valign="top"><a href="../www/command-line-options.html#list">-list <em class="option">type</em></a></td>
314 <td valign="top">Color, Configure, Delegate, Format, Magic, Module, Resource, or Type</td>
315 </tr>
316
317 <tr>
318 <td valign="top"><a href="../www/command-line-options.html#log">-log <em class="option">format</em></a></td>
319 <td valign="top">format of debugging information</td>
320 </tr>
321
322 <tr>
323 <td valign="top"><a href="../www/command-line-options.html#stream-map">-map <em class="option">components</em></a></td>
324 <td valign="top">store pixels in this format.</td>
325 </tr>
326
327 <tr>
328 <td valign="top"><a href="../www/command-line-options.html#monitor">-monitor</a></td>
329 <td valign="top">monitor progress</td>
330 </tr>
331
332 <tr>
333 <td valign="top"><a href="../www/command-line-options.html#quantize">-quantize <em class="option">colorspace</em></a></td>
334 <td valign="top">reduce image colors in this colorspace</td>
335 </tr>
336
337 <tr>
338 <td valign="top"><a href="../www/command-line-options.html#quiet">-quiet</a></td>
339 <td valign="top">suppress all warning messages</td>
340 </tr>
341
342 <tr>
343 <td valign="top"><a href="../www/command-line-options.html#regard-warnings">-regard-warnings</a></td>
344 <td valign="top">pay attention to warning messages.</td>
345 </tr>
346
347 <tr>
348 <td valign="top"><a href="../www/command-line-options.html#respect-parentheses">-respect-parentheses</a></td>
349 <td valign="top">settings remain in effect until parenthesis boundary.</td>
350 </tr>
351
352 <tr>
353 <td valign="top"><a href="../www/command-line-options.html#sampling-factor">-sampling-factor <em class="option">geometry</em></a></td>
354 <td valign="top">horizontal and vertical sampling factor</td>
355 </tr>
356
357 <tr>
358 <td valign="top"><a href="../www/command-line-options.html#seed">-seed <em class="option">value</em></a></td>
359 <td valign="top">seed a new sequence of pseudo-random numbers</td>
360 </tr>
361
362 <tr>
363 <td valign="top"><a href="../www/command-line-options.html#set">-set <em class="option">attribute value</em></a></td>
364 <td valign="top">set an image attribute</td>
365 </tr>
366
367 <tr>
368 <td valign="top"><a href="../www/command-line-options.html#size">-size <em class="option">geometry</em></a></td>
369 <td valign="top">width and height of image</td>
370 </tr>
371
372 <tr>
373 <td valign="top"><a href="../www/command-line-options.html#storage-type">-storage-type <em class="option">type</em></a></td>
374 <td valign="top">store pixels with this storage type.</td>
375 </tr>
376
377 <tr>
cristy5063d812010-10-19 16:28:10 +0000[diff] [blame]378 <td valign="top"><a href="../www/command-line-options.html#synchronize">-synchronize</a></td>
379 <td valign="top">synchronize image to storage device</td>
380 </tr>
381
382 <tr>
383 <td valign="top"><a href="../www/command-line-options.html#taint">-taint</a></td>
384 <td valign="top">mark the image as modified</td>
385 </tr>
386
387 <tr>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]388 <td valign="top"><a href="../www/command-line-options.html#transparent-color">-transparent-color <em class="option">color</em></a></td>
389 <td valign="top">transparent color</td>
390 </tr>
391
392 <tr>
393 <td valign="top"><a href="../www/command-line-options.html#verbose">-verbose</a></td>
394 <td valign="top">print detailed information about the image</td>
395 </tr>
396
397 <tr>
398 <td valign="top"><a href="../www/command-line-options.html#version">-version</a></td>
399 <td valign="top">print version information</td>
400 </tr>
401
402 <tr>
403 <td valign="top"><a href="../www/command-line-options.html#virtual-pixel">-virtual-pixel <em class="option">method</em></a></td>
404 <td valign="top">access method for pixels outside the boundaries of the image</td>
405 </tr>
406
407 </tbody>
408</table>
409
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