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202
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]203<h1>ImageMagick Stream Command-line Tool</h1>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]204<p class="navigation-index">[<a href="#usage">Example Usage</a> &bull; <a href="#options">Option Summary</a>]</p>
205
206<div class="doc-section">
207<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>
208</div>
209
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]210<h2><a id="usage"></a>Example Usage</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]211<div class="doc-section">
212
213<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>
214
215<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>
216<p>Here we extract a 100x100 region from a TIFF image in the grayscale format as doubles:</p>
217
218<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>
219<p>You can also associate the region to extract with the image filename:</p>
220
221<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>
222</div>
223
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]224<h2><a id="options"></a>Option Summary</h2>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]225<div class="doc-section">
226
227<p>The <kbd>stream</kbd> command recognizes these options. Click on an option to get more details about how that option works.</p>
228
229<table class="doc">
230 <tbody>
231 <tr>
232 <th align="left">Option</th>
233 <th align="left">Description</th>
234 </tr>
235
236 <tr>
237 <td valign="top"><a href="../www/command-line-options.html#authenticate">-authenticate <em class="option">value</em></a></td>
238 <td valign="top">decrypt image with this password</td>
239 </tr>
240
241 <tr>
242 <td valign="top"><a href="../www/command-line-options.html#channel">-channel <em class="option">type</em></a></td>
243 <td valign="top">apply option to select image channels</td>
244 </tr>
245
246 <tr>
247 <td valign="top"><a href="../www/command-line-options.html#colorspace">-colorspace <em class="option">type</em></a></td>
248 <td valign="top">set image colorspace</td>
249 </tr>
250
251 <tr>
252 <td valign="top"><a href="../www/command-line-options.html#debug">-debug <em class="option">events</em></a></td>
253 <td valign="top">display copious debugging information</td>
254 </tr>
255
256 <tr>
257 <td valign="top"><a href="../www/command-line-options.html#define">-define <em class="option">format:option</em></a></td>
258 <td valign="top">define one or more image format options</td>
259 </tr>
260
261 <tr>
262 <td valign="top"><a href="../www/command-line-options.html#density">-density <em class="option">geometry</em></a></td>
263 <td valign="top">horizontal and vertical density of the image</td>
264 </tr>
265
266 <tr>
267 <td valign="top"><a href="../www/command-line-options.html#depth">-depth <em class="option">value</em></a></td>
268 <td valign="top">image depth</td>
269 </tr>
270
271 <tr>
272 <td valign="top"><a href="../www/command-line-options.html#extract">-extract <em class="option">geometry</em></a></td>
273 <td valign="top">extract area from image</td>
274 </tr>
275
276 <tr>
277 <td valign="top"><a href="../www/command-line-options.html#help">-help</a></td>
278 <td valign="top">print program options</td>
279 </tr>
280
281 <tr>
282 <td valign="top"><a href="../www/command-line-options.html#interlace">-interlace <em class="option">type</em></a></td>
283 <td valign="top">type of image interlacing scheme</td>
284 </tr>
285
286 <tr>
287 <td valign="top"><a href="../www/command-line-options.html#interpolate">-interpolate <em class="option">method</em></a></td>
288 <td valign="top">pixel color interpolation method</td>
289 </tr>
290
291 <tr>
292 <td valign="top"><a href="../www/command-line-options.html#limit">-limit <em class="option">type value</em></a></td>
293 <td valign="top">pixel cache resource limit</td>
294 </tr>
295
296 <tr>
297 <td valign="top"><a href="../www/command-line-options.html#list">-list <em class="option">type</em></a></td>
298 <td valign="top">Color, Configure, Delegate, Format, Magic, Module, Resource, or Type</td>
299 </tr>
300
301 <tr>
302 <td valign="top"><a href="../www/command-line-options.html#log">-log <em class="option">format</em></a></td>
303 <td valign="top">format of debugging information</td>
304 </tr>
305
306 <tr>
307 <td valign="top"><a href="../www/command-line-options.html#stream-map">-map <em class="option">components</em></a></td>
308 <td valign="top">store pixels in this format.</td>
309 </tr>
310
311 <tr>
312 <td valign="top"><a href="../www/command-line-options.html#monitor">-monitor</a></td>
313 <td valign="top">monitor progress</td>
314 </tr>
315
316 <tr>
317 <td valign="top"><a href="../www/command-line-options.html#quantize">-quantize <em class="option">colorspace</em></a></td>
318 <td valign="top">reduce image colors in this colorspace</td>
319 </tr>
320
321 <tr>
322 <td valign="top"><a href="../www/command-line-options.html#quiet">-quiet</a></td>
323 <td valign="top">suppress all warning messages</td>
324 </tr>
325
326 <tr>
327 <td valign="top"><a href="../www/command-line-options.html#regard-warnings">-regard-warnings</a></td>
328 <td valign="top">pay attention to warning messages.</td>
329 </tr>
330
331 <tr>
332 <td valign="top"><a href="../www/command-line-options.html#respect-parentheses">-respect-parentheses</a></td>
333 <td valign="top">settings remain in effect until parenthesis boundary.</td>
334 </tr>
335
336 <tr>
337 <td valign="top"><a href="../www/command-line-options.html#sampling-factor">-sampling-factor <em class="option">geometry</em></a></td>
338 <td valign="top">horizontal and vertical sampling factor</td>
339 </tr>
340
341 <tr>
342 <td valign="top"><a href="../www/command-line-options.html#seed">-seed <em class="option">value</em></a></td>
343 <td valign="top">seed a new sequence of pseudo-random numbers</td>
344 </tr>
345
346 <tr>
347 <td valign="top"><a href="../www/command-line-options.html#set">-set <em class="option">attribute value</em></a></td>
348 <td valign="top">set an image attribute</td>
349 </tr>
350
351 <tr>
352 <td valign="top"><a href="../www/command-line-options.html#size">-size <em class="option">geometry</em></a></td>
353 <td valign="top">width and height of image</td>
354 </tr>
355
356 <tr>
357 <td valign="top"><a href="../www/command-line-options.html#storage-type">-storage-type <em class="option">type</em></a></td>
358 <td valign="top">store pixels with this storage type.</td>
359 </tr>
360
361 <tr>
cristy5063d812010-10-19 16:28:10 +0000[diff] [blame]362 <td valign="top"><a href="../www/command-line-options.html#synchronize">-synchronize</a></td>
363 <td valign="top">synchronize image to storage device</td>
364 </tr>
365
366 <tr>
367 <td valign="top"><a href="../www/command-line-options.html#taint">-taint</a></td>
368 <td valign="top">mark the image as modified</td>
369 </tr>
370
371 <tr>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]372 <td valign="top"><a href="../www/command-line-options.html#transparent-color">-transparent-color <em class="option">color</em></a></td>
373 <td valign="top">transparent color</td>
374 </tr>
375
376 <tr>
377 <td valign="top"><a href="../www/command-line-options.html#verbose">-verbose</a></td>
378 <td valign="top">print detailed information about the image</td>
379 </tr>
380
381 <tr>
382 <td valign="top"><a href="../www/command-line-options.html#version">-version</a></td>
383 <td valign="top">print version information</td>
384 </tr>
385
386 <tr>
387 <td valign="top"><a href="../www/command-line-options.html#virtual-pixel">-virtual-pixel <em class="option">method</em></a></td>
388 <td valign="top">access method for pixels outside the boundaries of the image</td>
389 </tr>
390
391 </tbody>
392</table>
393
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