1 2 3 4 5<!DOCTYPE html> 6<html lang="en"> 7<head> 8 <title>ImageMagick: Command-line Tools: Stream</title> 9 <meta charset="utf-8" /> 10 <meta http-equiv="X-UA-Compatible" content="IE=edge" /> 11 <meta name="viewport" content="width=device-width, initial-scale=1" /> 12 <meta http-equiv="content-type" content="text/html; charset=utf-8"/> 13 <meta name="application-name" content="ImageMagick"/> 14 <meta name="description" content="ImageMagick® is a software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats (over 200) including PNG, JPEG, JPEG-2000, GIF, WebP, Postscript, PDF, and SVG. 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It writes the pixel components as they are read from the input image a row at a time making <code>stream</code> desirable when working with large images or when you require raw pixel components.</p> 62 63<h2 class="magick-header"><a id="usage"></a>Example Usage</h2> 64 65<p>We list a few examples of the <code>stream</code> 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> 66 67<pre> 68stream -map rgb -storage-type char image.jpg pixels.dat 69display -depth 8 -size 640x480 rgb:pixels.dat 70</pre> 71 72<p>Here we extract a 100x100 region from a TIFF image in the grayscale format as doubles:</p> 73 74<pre> 75stream -map i -storage-type double -extract 100x100+30+40 image.tif gray.raw 76</pre> 77 78<p>You can also associate the region to extract with the image filename:</p> 79 80<pre> 81stream -map i -storage-type double 'image.tif[100x100+30+40]' gray.raw 82</pre> 83 84 85<h2 class="magick-header"><a id="options"></a>Option Summary</h2> 86 87<p>The <code>stream</code> command recognizes these options. Click on an option to get more details about how that option works.</p> 88 89<table class="table table-condensed table-striped"> 90 <tbody> 91 <tr> 92 <th align="left">Option</th> 93 <th align="left">Description</th> 94 </tr> 95 96 <tr> 97 <td><a href="command-line-options.html#authenticate">-authenticate <var>value</var></a></td> 98 <td>decrypt image with this password</td> 99 </tr> 100 101 <tr> 102 <td><a href="command-line-options.html#channel">-channel <var>type</var></a></td> 103 <td>apply option to select image channels</td> 104 </tr> 105 106 <tr> 107 <td><a href="command-line-options.html#colorspace">-colorspace <var>type</var></a></td> 108 <td>set image colorspace</td> 109 </tr> 110 111 <tr> 112 <td><a href="command-line-options.html#debug">-debug <var>events</var></a></td> 113 <td>display copious debugging information</td> 114 </tr> 115 116 <tr> 117 <td><a href="command-line-options.html#define">-define <var>format:option</var></a></td> 118 <td>define one or more image format options</td> 119 </tr> 120 121 <tr> 122 <td><a href="command-line-options.html#density">-density <var>geometry</var></a></td> 123 <td>horizontal and vertical density of the image</td> 124 </tr> 125 126 <tr> 127 <td><a href="command-line-options.html#depth">-depth <var>value</var></a></td> 128 <td>image depth</td> 129 </tr> 130 131 <tr> 132 <td><a href="command-line-options.html#extract">-extract <var>geometry</var></a></td> 133 <td>extract area from image</td> 134 </tr> 135 136 <tr> 137 <td><a href="command-line-options.html#help">-help</a></td> 138 <td>print program options</td> 139 </tr> 140 141 <tr> 142 <td><a href="command-line-options.html#interlace">-interlace <var>type</var></a></td> 143 <td>type of image interlacing scheme</td> 144 </tr> 145 146 <tr> 147 <td><a href="command-line-options.html#interpolate">-interpolate <var>method</var></a></td> 148 <td>pixel color interpolation method</td> 149 </tr> 150 151 <tr> 152 <td><a href="command-line-options.html#limit">-limit <var>type value</var></a></td> 153 <td>pixel cache resource limit</td> 154 </tr> 155 156 <tr> 157 <td><a href="command-line-options.html#list">-list <var>type</var></a></td> 158 <td>Color, Configure, Delegate, Format, Magic, Module, Resource, or Type</td> 159 </tr> 160 161 <tr> 162 <td><a href="command-line-options.html#log">-log <var>format</var></a></td> 163 <td>format of debugging information</td> 164 </tr> 165 166 <tr> 167 <td><a href="command-line-options.html#stream-map">-map <var>components</var></a></td> 168 <td>store pixels in this format.</td> 169 </tr> 170 171 <tr> 172 <td><a href="command-line-options.html#monitor">-monitor</a></td> 173 <td>monitor progress</td> 174 </tr> 175 176 <tr> 177 <td><a href="command-line-options.html#quantize">-quantize <var>colorspace</var></a></td> 178 <td>reduce image colors in this colorspace</td> 179 </tr> 180 181 <tr> 182 <td><a href="command-line-options.html#quiet">-quiet</a></td> 183 <td>suppress all warning messages</td> 184 </tr> 185 186 <tr> 187 <td><a href="command-line-options.html#regard-warnings">-regard-warnings</a></td> 188 <td>pay attention to warning messages.</td> 189 </tr> 190 191 <tr> 192 <td><a href="command-line-options.html#respect-parentheses">-respect-parentheses</a></td> 193 <td>settings remain in effect until parenthesis boundary.</td> 194 </tr> 195 196 <tr> 197 <td><a href="command-line-options.html#sampling-factor">-sampling-factor <var>geometry</var></a></td> 198 <td>horizontal and vertical sampling factor</td> 199 </tr> 200 201 <tr> 202 <td><a href="command-line-options.html#seed">-seed <var>value</var></a></td> 203 <td>seed a new sequence of pseudo-random numbers</td> 204 </tr> 205 206 <tr> 207 <td><a href="command-line-options.html#set">-set <var>attribute value</var></a></td> 208 <td>set an image attribute</td> 209 </tr> 210 211 <tr> 212 <td><a href="command-line-options.html#size">-size <var>geometry</var></a></td> 213 <td>width and height of image</td> 214 </tr> 215 216 <tr> 217 <td><a href="command-line-options.html#storage-type">-storage-type <var>type</var></a></td> 218 <td>store pixels with this storage type.</td> 219 </tr> 220 221 <tr> 222 <td><a href="command-line-options.html#synchronize">-synchronize</a></td> 223 <td>synchronize image to storage device</td> 224 </tr> 225 226 <tr> 227 <td><a href="command-line-options.html#taint">-taint</a></td> 228 <td>mark the image as modified</td> 229 </tr> 230 231 <tr> 232 <td><a href="command-line-options.html#transparent-color">-transparent-color <var>color</var></a></td> 233 <td>transparent color</td> 234 </tr> 235 236 <tr> 237 <td><a href="command-line-options.html#verbose">-verbose</a></td> 238 <td>print detailed information about the image</td> 239 </tr> 240 241 <tr> 242 <td><a href="command-line-options.html#version">-version</a></td> 243 <td>print version information</td> 244 </tr> 245 246 <tr> 247 <td><a href="command-line-options.html#virtual-pixel">-virtual-pixel <var>method</var></a></td> 248 <td>access method for pixels outside the boundaries of the image</td> 249 </tr> 250 251 </tbody> 252</table> 253 254</div> 255 <footer class="magick-footer"> 256 <p><a href="support.html">Donate</a> • 257 <a href="sitemap.html">Sitemap</a> • 258 <a href="links.html">Related</a> • 259 <a href="architecture.html">Architecture</a> 260</p> 261 <p><a href="stream.html#">Back to top</a> • 262 <a href="http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> • 263 <a href="http://www.imagemagick.org/script/contact.php">Contact Us</a></p> 264 <p><small>© 1999-2016 ImageMagick Studio LLC</small></p> 265 </footer> 266</div><!-- /.container --> 267 268 <script src="https://localhost/ajax/libs/jquery/1.11.3/jquery.min.js"></script> 269 <script src="../js/magick.html"></script> 270</div> 271</body> 272</html> 273
