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cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]215<h1>ImageMagick Stream Command-line Tool</h1>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]216<p class="navigation-index">[<a href="#usage">Example Usage</a> &bull; <a href="#options">Option Summary</a>]</p>
217
218<div class="doc-section">
219<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>
220</div>
221
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]222<h2><a id="usage"></a>Example Usage</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]223<div class="doc-section">
224
225<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>
226
227<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>
228<p>Here we extract a 100x100 region from a TIFF image in the grayscale format as doubles:</p>
229
230<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>
231<p>You can also associate the region to extract with the image filename:</p>
232
233<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>
234</div>
235
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]236<h2><a id="options"></a>Option Summary</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]237<div class="doc-section">
238
239<p>The <kbd>stream</kbd> command recognizes these options. Click on an option to get more details about how that option works.</p>
240
241<table class="doc">
242 <tbody>
243 <tr>
244 <th align="left">Option</th>
245 <th align="left">Description</th>
246 </tr>
247
248 <tr>
249 <td valign="top"><a href="../www/command-line-options.html#authenticate">-authenticate <em class="option">value</em></a></td>
250 <td valign="top">decrypt image with this password</td>
251 </tr>
252
253 <tr>
254 <td valign="top"><a href="../www/command-line-options.html#channel">-channel <em class="option">type</em></a></td>
255 <td valign="top">apply option to select image channels</td>
256 </tr>
257
258 <tr>
259 <td valign="top"><a href="../www/command-line-options.html#colorspace">-colorspace <em class="option">type</em></a></td>
260 <td valign="top">set image colorspace</td>
261 </tr>
262
263 <tr>
264 <td valign="top"><a href="../www/command-line-options.html#debug">-debug <em class="option">events</em></a></td>
265 <td valign="top">display copious debugging information</td>
266 </tr>
267
268 <tr>
269 <td valign="top"><a href="../www/command-line-options.html#define">-define <em class="option">format:option</em></a></td>
270 <td valign="top">define one or more image format options</td>
271 </tr>
272
273 <tr>
274 <td valign="top"><a href="../www/command-line-options.html#density">-density <em class="option">geometry</em></a></td>
275 <td valign="top">horizontal and vertical density of the image</td>
276 </tr>
277
278 <tr>
279 <td valign="top"><a href="../www/command-line-options.html#depth">-depth <em class="option">value</em></a></td>
280 <td valign="top">image depth</td>
281 </tr>
282
283 <tr>
284 <td valign="top"><a href="../www/command-line-options.html#extract">-extract <em class="option">geometry</em></a></td>
285 <td valign="top">extract area from image</td>
286 </tr>
287
288 <tr>
289 <td valign="top"><a href="../www/command-line-options.html#help">-help</a></td>
290 <td valign="top">print program options</td>
291 </tr>
292
293 <tr>
294 <td valign="top"><a href="../www/command-line-options.html#interlace">-interlace <em class="option">type</em></a></td>
295 <td valign="top">type of image interlacing scheme</td>
296 </tr>
297
298 <tr>
299 <td valign="top"><a href="../www/command-line-options.html#interpolate">-interpolate <em class="option">method</em></a></td>
300 <td valign="top">pixel color interpolation method</td>
301 </tr>
302
303 <tr>
304 <td valign="top"><a href="../www/command-line-options.html#limit">-limit <em class="option">type value</em></a></td>
305 <td valign="top">pixel cache resource limit</td>
306 </tr>
307
308 <tr>
309 <td valign="top"><a href="../www/command-line-options.html#list">-list <em class="option">type</em></a></td>
310 <td valign="top">Color, Configure, Delegate, Format, Magic, Module, Resource, or Type</td>
311 </tr>
312
313 <tr>
314 <td valign="top"><a href="../www/command-line-options.html#log">-log <em class="option">format</em></a></td>
315 <td valign="top">format of debugging information</td>
316 </tr>
317
318 <tr>
319 <td valign="top"><a href="../www/command-line-options.html#stream-map">-map <em class="option">components</em></a></td>
320 <td valign="top">store pixels in this format.</td>
321 </tr>
322
323 <tr>
324 <td valign="top"><a href="../www/command-line-options.html#monitor">-monitor</a></td>
325 <td valign="top">monitor progress</td>
326 </tr>
327
328 <tr>
329 <td valign="top"><a href="../www/command-line-options.html#quantize">-quantize <em class="option">colorspace</em></a></td>
330 <td valign="top">reduce image colors in this colorspace</td>
331 </tr>
332
333 <tr>
334 <td valign="top"><a href="../www/command-line-options.html#quiet">-quiet</a></td>
335 <td valign="top">suppress all warning messages</td>
336 </tr>
337
338 <tr>
339 <td valign="top"><a href="../www/command-line-options.html#regard-warnings">-regard-warnings</a></td>
340 <td valign="top">pay attention to warning messages.</td>
341 </tr>
342
343 <tr>
344 <td valign="top"><a href="../www/command-line-options.html#respect-parentheses">-respect-parentheses</a></td>
345 <td valign="top">settings remain in effect until parenthesis boundary.</td>
346 </tr>
347
348 <tr>
349 <td valign="top"><a href="../www/command-line-options.html#sampling-factor">-sampling-factor <em class="option">geometry</em></a></td>
350 <td valign="top">horizontal and vertical sampling factor</td>
351 </tr>
352
353 <tr>
354 <td valign="top"><a href="../www/command-line-options.html#seed">-seed <em class="option">value</em></a></td>
355 <td valign="top">seed a new sequence of pseudo-random numbers</td>
356 </tr>
357
358 <tr>
359 <td valign="top"><a href="../www/command-line-options.html#set">-set <em class="option">attribute value</em></a></td>
360 <td valign="top">set an image attribute</td>
361 </tr>
362
363 <tr>
364 <td valign="top"><a href="../www/command-line-options.html#size">-size <em class="option">geometry</em></a></td>
365 <td valign="top">width and height of image</td>
366 </tr>
367
368 <tr>
369 <td valign="top"><a href="../www/command-line-options.html#storage-type">-storage-type <em class="option">type</em></a></td>
370 <td valign="top">store pixels with this storage type.</td>
371 </tr>
372
373 <tr>
cristy5063d812010-10-19 16:28:10 +0000[diff] [blame]374 <td valign="top"><a href="../www/command-line-options.html#synchronize">-synchronize</a></td>
375 <td valign="top">synchronize image to storage device</td>
376 </tr>
377
378 <tr>
379 <td valign="top"><a href="../www/command-line-options.html#taint">-taint</a></td>
380 <td valign="top">mark the image as modified</td>
381 </tr>
382
383 <tr>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]384 <td valign="top"><a href="../www/command-line-options.html#transparent-color">-transparent-color <em class="option">color</em></a></td>
385 <td valign="top">transparent color</td>
386 </tr>
387
388 <tr>
389 <td valign="top"><a href="../www/command-line-options.html#verbose">-verbose</a></td>
390 <td valign="top">print detailed information about the image</td>
391 </tr>
392
393 <tr>
394 <td valign="top"><a href="../www/command-line-options.html#version">-version</a></td>
395 <td valign="top">print version information</td>
396 </tr>
397
398 <tr>
399 <td valign="top"><a href="../www/command-line-options.html#virtual-pixel">-virtual-pixel <em class="option">method</em></a></td>
400 <td valign="top">access method for pixels outside the boundaries of the image</td>
401 </tr>
402
403 </tbody>
404</table>
405
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