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211
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]212<h1>ImageMagick Stream Command-line Tool</h1>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]213<p class="navigation-index">[<a href="#usage">Example Usage</a> &bull; <a href="#options">Option Summary</a>]</p>
214
215<div class="doc-section">
216<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>
217</div>
218
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]219<h2><a id="usage"></a>Example Usage</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]220<div class="doc-section">
221
222<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>
223
224<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>
225<p>Here we extract a 100x100 region from a TIFF image in the grayscale format as doubles:</p>
226
227<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>
228<p>You can also associate the region to extract with the image filename:</p>
229
230<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>
231</div>
232
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]233<h2><a id="options"></a>Option Summary</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]234<div class="doc-section">
235
236<p>The <kbd>stream</kbd> command recognizes these options. Click on an option to get more details about how that option works.</p>
237
238<table class="doc">
239 <tbody>
240 <tr>
241 <th align="left">Option</th>
242 <th align="left">Description</th>
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">decrypt image with this password</td>
248 </tr>
249
250 <tr>
251 <td valign="top"><a href="../www/command-line-options.html#channel">-channel <em class="option">type</em></a></td>
252 <td valign="top">apply option to select image channels</td>
253 </tr>
254
255 <tr>
256 <td valign="top"><a href="../www/command-line-options.html#colorspace">-colorspace <em class="option">type</em></a></td>
257 <td valign="top">set image colorspace</td>
258 </tr>
259
260 <tr>
261 <td valign="top"><a href="../www/command-line-options.html#debug">-debug <em class="option">events</em></a></td>
262 <td valign="top">display copious debugging information</td>
263 </tr>
264
265 <tr>
266 <td valign="top"><a href="../www/command-line-options.html#define">-define <em class="option">format:option</em></a></td>
267 <td valign="top">define one or more image format options</td>
268 </tr>
269
270 <tr>
271 <td valign="top"><a href="../www/command-line-options.html#density">-density <em class="option">geometry</em></a></td>
272 <td valign="top">horizontal and vertical density of the image</td>
273 </tr>
274
275 <tr>
276 <td valign="top"><a href="../www/command-line-options.html#depth">-depth <em class="option">value</em></a></td>
277 <td valign="top">image depth</td>
278 </tr>
279
280 <tr>
281 <td valign="top"><a href="../www/command-line-options.html#extract">-extract <em class="option">geometry</em></a></td>
282 <td valign="top">extract area from image</td>
283 </tr>
284
285 <tr>
286 <td valign="top"><a href="../www/command-line-options.html#help">-help</a></td>
287 <td valign="top">print program options</td>
288 </tr>
289
290 <tr>
291 <td valign="top"><a href="../www/command-line-options.html#interlace">-interlace <em class="option">type</em></a></td>
292 <td valign="top">type of image interlacing scheme</td>
293 </tr>
294
295 <tr>
296 <td valign="top"><a href="../www/command-line-options.html#interpolate">-interpolate <em class="option">method</em></a></td>
297 <td valign="top">pixel color interpolation method</td>
298 </tr>
299
300 <tr>
301 <td valign="top"><a href="../www/command-line-options.html#limit">-limit <em class="option">type value</em></a></td>
302 <td valign="top">pixel cache resource limit</td>
303 </tr>
304
305 <tr>
306 <td valign="top"><a href="../www/command-line-options.html#list">-list <em class="option">type</em></a></td>
307 <td valign="top">Color, Configure, Delegate, Format, Magic, Module, Resource, or Type</td>
308 </tr>
309
310 <tr>
311 <td valign="top"><a href="../www/command-line-options.html#log">-log <em class="option">format</em></a></td>
312 <td valign="top">format of debugging information</td>
313 </tr>
314
315 <tr>
316 <td valign="top"><a href="../www/command-line-options.html#stream-map">-map <em class="option">components</em></a></td>
317 <td valign="top">store pixels in this format.</td>
318 </tr>
319
320 <tr>
321 <td valign="top"><a href="../www/command-line-options.html#monitor">-monitor</a></td>
322 <td valign="top">monitor progress</td>
323 </tr>
324
325 <tr>
326 <td valign="top"><a href="../www/command-line-options.html#quantize">-quantize <em class="option">colorspace</em></a></td>
327 <td valign="top">reduce image colors in this colorspace</td>
328 </tr>
329
330 <tr>
331 <td valign="top"><a href="../www/command-line-options.html#quiet">-quiet</a></td>
332 <td valign="top">suppress all warning messages</td>
333 </tr>
334
335 <tr>
336 <td valign="top"><a href="../www/command-line-options.html#regard-warnings">-regard-warnings</a></td>
337 <td valign="top">pay attention to warning messages.</td>
338 </tr>
339
340 <tr>
341 <td valign="top"><a href="../www/command-line-options.html#respect-parentheses">-respect-parentheses</a></td>
342 <td valign="top">settings remain in effect until parenthesis boundary.</td>
343 </tr>
344
345 <tr>
346 <td valign="top"><a href="../www/command-line-options.html#sampling-factor">-sampling-factor <em class="option">geometry</em></a></td>
347 <td valign="top">horizontal and vertical sampling factor</td>
348 </tr>
349
350 <tr>
351 <td valign="top"><a href="../www/command-line-options.html#seed">-seed <em class="option">value</em></a></td>
352 <td valign="top">seed a new sequence of pseudo-random numbers</td>
353 </tr>
354
355 <tr>
356 <td valign="top"><a href="../www/command-line-options.html#set">-set <em class="option">attribute value</em></a></td>
357 <td valign="top">set an image attribute</td>
358 </tr>
359
360 <tr>
361 <td valign="top"><a href="../www/command-line-options.html#size">-size <em class="option">geometry</em></a></td>
362 <td valign="top">width and height of image</td>
363 </tr>
364
365 <tr>
366 <td valign="top"><a href="../www/command-line-options.html#storage-type">-storage-type <em class="option">type</em></a></td>
367 <td valign="top">store pixels with this storage type.</td>
368 </tr>
369
370 <tr>
cristy5063d812010-10-19 16:28:10 +0000[diff] [blame]371 <td valign="top"><a href="../www/command-line-options.html#synchronize">-synchronize</a></td>
372 <td valign="top">synchronize image to storage device</td>
373 </tr>
374
375 <tr>
376 <td valign="top"><a href="../www/command-line-options.html#taint">-taint</a></td>
377 <td valign="top">mark the image as modified</td>
378 </tr>
379
380 <tr>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]381 <td valign="top"><a href="../www/command-line-options.html#transparent-color">-transparent-color <em class="option">color</em></a></td>
382 <td valign="top">transparent color</td>
383 </tr>
384
385 <tr>
386 <td valign="top"><a href="../www/command-line-options.html#verbose">-verbose</a></td>
387 <td valign="top">print detailed information about the image</td>
388 </tr>
389
390 <tr>
391 <td valign="top"><a href="../www/command-line-options.html#version">-version</a></td>
392 <td valign="top">print version information</td>
393 </tr>
394
395 <tr>
396 <td valign="top"><a href="../www/command-line-options.html#virtual-pixel">-virtual-pixel <em class="option">method</em></a></td>
397 <td valign="top">access method for pixels outside the boundaries of the image</td>
398 </tr>
399
400 </tbody>
401</table>
402
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