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- <meta name="Description" content="ImageMagick® is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX. Use ImageMagick to translate, flip, mirror, rotate, scale, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves. ImageMagick is free software delivered as a ready-to-run binary distribution or as source code that you can freely use, copy, modify, and distribute. Its license is compatible with the GPL. It runs on all major operating systems. The functionality of ImageMagick is typically utilized from the command line or you can use the features from programs written in your favorite programming language. Choose from these interfaces: MagickCore (C), MagickWand (C), ChMagick (Ch), Magick++ (C++), JMagick (Java), L-Magick (Lisp), PascalMagick (Pascal), PerlMagick (Perl), MagickWand for PHP (PHP), PythonMagick (Python), RMagick (Ruby), or TclMagick (Tcl/TK). With a language interface, use ImageMagick to modify or create images automagically and dynamically."/>
+ <meta name="Description" content="ImageMagick is a software suite to create, edit, or compose bitmap images in a variety of formats. Use ImageMagick to scale, rotate, shear, distort and transform images."/>
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+<h1>ImageMagick Architecture</h1>
<p class="navigation-index">[<a href="#overview">Architecture Overview</a> • <a href="#cache">The Pixel Cache</a> • <a href="#stream">Streaming Pixels</a> • <a href="#properties">Image Properties and Profiles</a> • <a href="#tera-pixel">Large Image Support</a> • <a href="#threads">Threads of Execution</a> • <a href="#distributed">Heterogeneous Distributed Processing</a> • <a href="#coders">Custom Image Coders</a> • <a href="#filters">Custom Image Filters</a>]</p>
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<p>The citizens of Oz were quite content with their benefactor, the all-powerful Wizard. They accepted his wisdom and benevolence without ever questioning the who, why, and where of his power. Like the citizens of Oz, if you feel comfortable that ImageMagick can help you convert, edit, or compose your images without knowing what goes on behind the curtain, feel free to skip this section. However, if you want to know more about the software and algorithms behind ImageMagick, read on. To fully benefit from this discussion, you should be comfortable with image nomenclature and be familiar with computer programming.</p>
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<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 with the <a href="../www/command-line-options.html#version">‑version</a> option: </p>
-<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>identify -version</span><span class='crtout'>Version: ImageMagick 6.6.6-6 2010-12-01 Q16 http://www.imagemagick.org</span></p>
+<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>identify -version</span><span class='crtout'>Version: ImageMagick 6.6.6-7 2010-12-15 Q16 http://www.imagemagick.org</span></p>
<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). In most cases, the benefits of the pixel cache typically outweigh any disadvantages.</p>
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