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199
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]200<h1>ImageMagick Stream Command-line Tool</h1>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]201<p class="navigation-index">[<a href="#usage">Example Usage</a> &bull; <a href="#options">Option Summary</a>]</p>
202
203<div class="doc-section">
204<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>
205</div>
206
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]207<h2><a id="usage"></a>Example Usage</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]208<div class="doc-section">
209
210<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>
211
212<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>
213<p>Here we extract a 100x100 region from a TIFF image in the grayscale format as doubles:</p>
214
215<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>
216<p>You can also associate the region to extract with the image filename:</p>
217
218<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>
219</div>
220
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]221<h2><a id="options"></a>Option Summary</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]222<div class="doc-section">
223
224<p>The <kbd>stream</kbd> command recognizes these options. Click on an option to get more details about how that option works.</p>
225
226<table class="doc">
227 <tbody>
228 <tr>
229 <th align="left">Option</th>
230 <th align="left">Description</th>
231 </tr>
232
233 <tr>
234 <td valign="top"><a href="../www/command-line-options.html#authenticate">-authenticate <em class="option">value</em></a></td>
235 <td valign="top">decrypt image with this password</td>
236 </tr>
237
238 <tr>
239 <td valign="top"><a href="../www/command-line-options.html#channel">-channel <em class="option">type</em></a></td>
240 <td valign="top">apply option to select image channels</td>
241 </tr>
242
243 <tr>
244 <td valign="top"><a href="../www/command-line-options.html#colorspace">-colorspace <em class="option">type</em></a></td>
245 <td valign="top">set image colorspace</td>
246 </tr>
247
248 <tr>
249 <td valign="top"><a href="../www/command-line-options.html#debug">-debug <em class="option">events</em></a></td>
250 <td valign="top">display copious debugging information</td>
251 </tr>
252
253 <tr>
254 <td valign="top"><a href="../www/command-line-options.html#define">-define <em class="option">format:option</em></a></td>
255 <td valign="top">define one or more image format options</td>
256 </tr>
257
258 <tr>
259 <td valign="top"><a href="../www/command-line-options.html#density">-density <em class="option">geometry</em></a></td>
260 <td valign="top">horizontal and vertical density of the image</td>
261 </tr>
262
263 <tr>
264 <td valign="top"><a href="../www/command-line-options.html#depth">-depth <em class="option">value</em></a></td>
265 <td valign="top">image depth</td>
266 </tr>
267
268 <tr>
269 <td valign="top"><a href="../www/command-line-options.html#extract">-extract <em class="option">geometry</em></a></td>
270 <td valign="top">extract area from image</td>
271 </tr>
272
273 <tr>
274 <td valign="top"><a href="../www/command-line-options.html#help">-help</a></td>
275 <td valign="top">print program options</td>
276 </tr>
277
278 <tr>
279 <td valign="top"><a href="../www/command-line-options.html#interlace">-interlace <em class="option">type</em></a></td>
280 <td valign="top">type of image interlacing scheme</td>
281 </tr>
282
283 <tr>
284 <td valign="top"><a href="../www/command-line-options.html#interpolate">-interpolate <em class="option">method</em></a></td>
285 <td valign="top">pixel color interpolation method</td>
286 </tr>
287
288 <tr>
289 <td valign="top"><a href="../www/command-line-options.html#limit">-limit <em class="option">type value</em></a></td>
290 <td valign="top">pixel cache resource limit</td>
291 </tr>
292
293 <tr>
294 <td valign="top"><a href="../www/command-line-options.html#list">-list <em class="option">type</em></a></td>
295 <td valign="top">Color, Configure, Delegate, Format, Magic, Module, Resource, or Type</td>
296 </tr>
297
298 <tr>
299 <td valign="top"><a href="../www/command-line-options.html#log">-log <em class="option">format</em></a></td>
300 <td valign="top">format of debugging information</td>
301 </tr>
302
303 <tr>
304 <td valign="top"><a href="../www/command-line-options.html#stream-map">-map <em class="option">components</em></a></td>
305 <td valign="top">store pixels in this format.</td>
306 </tr>
307
308 <tr>
309 <td valign="top"><a href="../www/command-line-options.html#monitor">-monitor</a></td>
310 <td valign="top">monitor progress</td>
311 </tr>
312
313 <tr>
314 <td valign="top"><a href="../www/command-line-options.html#quantize">-quantize <em class="option">colorspace</em></a></td>
315 <td valign="top">reduce image colors in this colorspace</td>
316 </tr>
317
318 <tr>
319 <td valign="top"><a href="../www/command-line-options.html#quiet">-quiet</a></td>
320 <td valign="top">suppress all warning messages</td>
321 </tr>
322
323 <tr>
324 <td valign="top"><a href="../www/command-line-options.html#regard-warnings">-regard-warnings</a></td>
325 <td valign="top">pay attention to warning messages.</td>
326 </tr>
327
328 <tr>
329 <td valign="top"><a href="../www/command-line-options.html#respect-parentheses">-respect-parentheses</a></td>
330 <td valign="top">settings remain in effect until parenthesis boundary.</td>
331 </tr>
332
333 <tr>
334 <td valign="top"><a href="../www/command-line-options.html#sampling-factor">-sampling-factor <em class="option">geometry</em></a></td>
335 <td valign="top">horizontal and vertical sampling factor</td>
336 </tr>
337
338 <tr>
339 <td valign="top"><a href="../www/command-line-options.html#seed">-seed <em class="option">value</em></a></td>
340 <td valign="top">seed a new sequence of pseudo-random numbers</td>
341 </tr>
342
343 <tr>
344 <td valign="top"><a href="../www/command-line-options.html#set">-set <em class="option">attribute value</em></a></td>
345 <td valign="top">set an image attribute</td>
346 </tr>
347
348 <tr>
349 <td valign="top"><a href="../www/command-line-options.html#size">-size <em class="option">geometry</em></a></td>
350 <td valign="top">width and height of image</td>
351 </tr>
352
353 <tr>
354 <td valign="top"><a href="../www/command-line-options.html#storage-type">-storage-type <em class="option">type</em></a></td>
355 <td valign="top">store pixels with this storage type.</td>
356 </tr>
357
358 <tr>
cristy5063d812010-10-19 16:28:10 +0000[diff] [blame]359 <td valign="top"><a href="../www/command-line-options.html#synchronize">-synchronize</a></td>
360 <td valign="top">synchronize image to storage device</td>
361 </tr>
362
363 <tr>
364 <td valign="top"><a href="../www/command-line-options.html#taint">-taint</a></td>
365 <td valign="top">mark the image as modified</td>
366 </tr>
367
368 <tr>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]369 <td valign="top"><a href="../www/command-line-options.html#transparent-color">-transparent-color <em class="option">color</em></a></td>
370 <td valign="top">transparent color</td>
371 </tr>
372
373 <tr>
374 <td valign="top"><a href="../www/command-line-options.html#verbose">-verbose</a></td>
375 <td valign="top">print detailed information about the image</td>
376 </tr>
377
378 <tr>
379 <td valign="top"><a href="../www/command-line-options.html#version">-version</a></td>
380 <td valign="top">print version information</td>
381 </tr>
382
383 <tr>
384 <td valign="top"><a href="../www/command-line-options.html#virtual-pixel">-virtual-pixel <em class="option">method</em></a></td>
385 <td valign="top">access method for pixels outside the boundaries of the image</td>
386 </tr>
387
388 </tbody>
389</table>
390
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