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cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]216<h1>ImageMagick Stream Command-line Tool</h1>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]217<p class="navigation-index">[<a href="#usage">Example Usage</a> &bull; <a href="#options">Option Summary</a>]</p>
218
219<div class="doc-section">
220<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>
221</div>
222
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]223<h2><a id="usage"></a>Example Usage</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]224<div class="doc-section">
225
226<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>
227
228<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>
229<p>Here we extract a 100x100 region from a TIFF image in the grayscale format as doubles:</p>
230
231<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>
232<p>You can also associate the region to extract with the image filename:</p>
233
234<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>
235</div>
236
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]237<h2><a id="options"></a>Option Summary</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]238<div class="doc-section">
239
240<p>The <kbd>stream</kbd> command recognizes these options. Click on an option to get more details about how that option works.</p>
241
242<table class="doc">
243 <tbody>
244 <tr>
245 <th align="left">Option</th>
246 <th align="left">Description</th>
247 </tr>
248
249 <tr>
250 <td valign="top"><a href="../www/command-line-options.html#authenticate">-authenticate <em class="option">value</em></a></td>
251 <td valign="top">decrypt image with this password</td>
252 </tr>
253
254 <tr>
255 <td valign="top"><a href="../www/command-line-options.html#channel">-channel <em class="option">type</em></a></td>
256 <td valign="top">apply option to select image channels</td>
257 </tr>
258
259 <tr>
260 <td valign="top"><a href="../www/command-line-options.html#colorspace">-colorspace <em class="option">type</em></a></td>
261 <td valign="top">set image colorspace</td>
262 </tr>
263
264 <tr>
265 <td valign="top"><a href="../www/command-line-options.html#debug">-debug <em class="option">events</em></a></td>
266 <td valign="top">display copious debugging information</td>
267 </tr>
268
269 <tr>
270 <td valign="top"><a href="../www/command-line-options.html#define">-define <em class="option">format:option</em></a></td>
271 <td valign="top">define one or more image format options</td>
272 </tr>
273
274 <tr>
275 <td valign="top"><a href="../www/command-line-options.html#density">-density <em class="option">geometry</em></a></td>
276 <td valign="top">horizontal and vertical density of the image</td>
277 </tr>
278
279 <tr>
280 <td valign="top"><a href="../www/command-line-options.html#depth">-depth <em class="option">value</em></a></td>
281 <td valign="top">image depth</td>
282 </tr>
283
284 <tr>
285 <td valign="top"><a href="../www/command-line-options.html#extract">-extract <em class="option">geometry</em></a></td>
286 <td valign="top">extract area from image</td>
287 </tr>
288
289 <tr>
290 <td valign="top"><a href="../www/command-line-options.html#help">-help</a></td>
291 <td valign="top">print program options</td>
292 </tr>
293
294 <tr>
295 <td valign="top"><a href="../www/command-line-options.html#interlace">-interlace <em class="option">type</em></a></td>
296 <td valign="top">type of image interlacing scheme</td>
297 </tr>
298
299 <tr>
300 <td valign="top"><a href="../www/command-line-options.html#interpolate">-interpolate <em class="option">method</em></a></td>
301 <td valign="top">pixel color interpolation method</td>
302 </tr>
303
304 <tr>
305 <td valign="top"><a href="../www/command-line-options.html#limit">-limit <em class="option">type value</em></a></td>
306 <td valign="top">pixel cache resource limit</td>
307 </tr>
308
309 <tr>
310 <td valign="top"><a href="../www/command-line-options.html#list">-list <em class="option">type</em></a></td>
311 <td valign="top">Color, Configure, Delegate, Format, Magic, Module, Resource, or Type</td>
312 </tr>
313
314 <tr>
315 <td valign="top"><a href="../www/command-line-options.html#log">-log <em class="option">format</em></a></td>
316 <td valign="top">format of debugging information</td>
317 </tr>
318
319 <tr>
320 <td valign="top"><a href="../www/command-line-options.html#stream-map">-map <em class="option">components</em></a></td>
321 <td valign="top">store pixels in this format.</td>
322 </tr>
323
324 <tr>
325 <td valign="top"><a href="../www/command-line-options.html#monitor">-monitor</a></td>
326 <td valign="top">monitor progress</td>
327 </tr>
328
329 <tr>
330 <td valign="top"><a href="../www/command-line-options.html#quantize">-quantize <em class="option">colorspace</em></a></td>
331 <td valign="top">reduce image colors in this colorspace</td>
332 </tr>
333
334 <tr>
335 <td valign="top"><a href="../www/command-line-options.html#quiet">-quiet</a></td>
336 <td valign="top">suppress all warning messages</td>
337 </tr>
338
339 <tr>
340 <td valign="top"><a href="../www/command-line-options.html#regard-warnings">-regard-warnings</a></td>
341 <td valign="top">pay attention to warning messages.</td>
342 </tr>
343
344 <tr>
345 <td valign="top"><a href="../www/command-line-options.html#respect-parentheses">-respect-parentheses</a></td>
346 <td valign="top">settings remain in effect until parenthesis boundary.</td>
347 </tr>
348
349 <tr>
350 <td valign="top"><a href="../www/command-line-options.html#sampling-factor">-sampling-factor <em class="option">geometry</em></a></td>
351 <td valign="top">horizontal and vertical sampling factor</td>
352 </tr>
353
354 <tr>
355 <td valign="top"><a href="../www/command-line-options.html#seed">-seed <em class="option">value</em></a></td>
356 <td valign="top">seed a new sequence of pseudo-random numbers</td>
357 </tr>
358
359 <tr>
360 <td valign="top"><a href="../www/command-line-options.html#set">-set <em class="option">attribute value</em></a></td>
361 <td valign="top">set an image attribute</td>
362 </tr>
363
364 <tr>
365 <td valign="top"><a href="../www/command-line-options.html#size">-size <em class="option">geometry</em></a></td>
366 <td valign="top">width and height of image</td>
367 </tr>
368
369 <tr>
370 <td valign="top"><a href="../www/command-line-options.html#storage-type">-storage-type <em class="option">type</em></a></td>
371 <td valign="top">store pixels with this storage type.</td>
372 </tr>
373
374 <tr>
cristy5063d812010-10-19 16:28:10 +0000[diff] [blame]375 <td valign="top"><a href="../www/command-line-options.html#synchronize">-synchronize</a></td>
376 <td valign="top">synchronize image to storage device</td>
377 </tr>
378
379 <tr>
380 <td valign="top"><a href="../www/command-line-options.html#taint">-taint</a></td>
381 <td valign="top">mark the image as modified</td>
382 </tr>
383
384 <tr>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]385 <td valign="top"><a href="../www/command-line-options.html#transparent-color">-transparent-color <em class="option">color</em></a></td>
386 <td valign="top">transparent color</td>
387 </tr>
388
389 <tr>
390 <td valign="top"><a href="../www/command-line-options.html#verbose">-verbose</a></td>
391 <td valign="top">print detailed information about the image</td>
392 </tr>
393
394 <tr>
395 <td valign="top"><a href="../www/command-line-options.html#version">-version</a></td>
396 <td valign="top">print version information</td>
397 </tr>
398
399 <tr>
400 <td valign="top"><a href="../www/command-line-options.html#virtual-pixel">-virtual-pixel <em class="option">method</em></a></td>
401 <td valign="top">access method for pixels outside the boundaries of the image</td>
402 </tr>
403
404 </tbody>
405</table>
406
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