Changeset 300 for ImageMagick/trunk/www/architecture.html
- Timestamp:
- 10/05/09 18:57:36 (6 months ago)
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ImageMagick/trunk/www/architecture.html (modified) (2 diffs)
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ImageMagick/trunk/www/architecture.html
r296 r300 238 238 <p>When the pixel cache is initialized, pixels are scaled from whatever bit depth they originated from to that required by the pixel cache. For example, a 1-channel 1-bit monochrome PBM image is scaled to a 4 channel 8-bit RGBA image, if you are using the Q8 version of ImageMagick, and 16-bit RGBA for the Q16 version. You can determine which version you have using the <a href="../www/command-line-options.html#version">‑version</a> option, as with this command: </p> 239 239 240 <p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>identify -version</span><span class='crtout'>Version: ImageMagick 6.5.6- 82009-10-01 Q16 http://www.imagemagick.org</span></p>240 <p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>identify -version</span><span class='crtout'>Version: ImageMagick 6.5.6-9 2009-10-01 Q16 http://www.imagemagick.org</span></p> 241 241 <p>As you can see, the convenience of the pixel cache sometimes comes with a trade-off in storage (e.g. storing a 1-bit monochrome image as 16-bit RGBA is wasteful) and speed (i.e. storing the entire image in memory is generally slower than accessing one scanline of pixels at a time).</p> 242 242 </div> … … 1221 1221 <a href="http://www.imagemagick.org/discourse-server/">Discourse Server</a> • 1222 1222 <a href="../www/mailing-list.html">Mailing Lists</a> • 1223 <a href="http:// studio.webbyland.com/ImageMagick/MagickStudio/scripts/MagickStudio.cgi">Studio</a>1223 <a href="http://www.imagemagick.org/MagickStudio/scripts/MagickStudio.cgi">Studio</a> 1224 1224 </span> 1225 1225 <span id="linkbar-east"> </span>
