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22 | <TITLE>Generic Image Library: Pixel</TITLE> | |
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38 | <div class="contents"> | |
39 | <h1>Pixel</h1><hr><a name="_details"></a><h2>Detailed Description</h2> | |
40 | A pixel is a set of channels defining the color at a given point in an image. | |
41 | <p> | |
42 | Conceptually, a pixel is little more than a color base whose elements model <code>ChannelConcept</code>. Many properties of pixels inherit from color bases: pixels may be <em>homogeneous</em> if all of their channels have the same type; otherwise they are called <em>heterogeneous</em>. The channels of a pixel may be addressed using semantic or physical indexing, or by color; all color base algorithms work on pixels as well. Two pixels are <em>compatible</em> if their color spaces are the same and their channels, paired semantically, are compatible. Note that constness, memory organization and reference/value are ignored. For example, an 8-bit RGB planar reference is compatible to a constant 8-bit BGR interleaved pixel value. Most pairwise pixel operations (copy construction, assignment, equality, etc.) are only defined for compatible pixels. | |
43 | <p> | |
44 | <table border="0" cellpadding="0" cellspacing="0"> | |
45 | <tr><td></td></tr> | |
46 | <tr><td colspan="2"><br><h2>Modules</h2></td></tr> | |
47 | <tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="g_i_l_0183.html">Concepts</a></td></tr> | |
48 | ||
49 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Pixel concepts. <br></td></tr> | |
50 | ||
51 | <p> | |
52 | <tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="g_i_l_0206.html">Models</a></td></tr> | |
53 | ||
54 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Pixel models. <br></td></tr> | |
55 | ||
56 | <p> | |
57 | <tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="g_i_l_0178.html">Algorithms and Utility Functions</a></td></tr> | |
58 | ||
59 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Pixel algorithms, metafunctions and utility functions. <br></td></tr> | |
60 | ||
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