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  1. <?xml version="1.0" encoding="UTF-8" standalone="no"?>
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  6.     <title>3.20.┬áSemi-Flatten</title>
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  11.     <link rel="up" href="ch06s03.html" title="3.┬áColor filters" />
  12.     <link rel="prev" href="ch06s03s19.html" title="3.19.┬áMax RGB" />
  13.     <link rel="next" href="ch06s03s21.html" title="3.21.┬áSmooth Palette" />
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  16.     <div xmlns="" class="navheader">
  17.       <table width="100%" summary="Navigation header">
  18.         <tr>
  19.           <th colspan="3" align="center" id="chaptername">3.┬áColor filters</th>
  20.         </tr>
  21.         <tr>
  22.           <td width="20%" align="left"><a accesskey="p" href="ch06s03s19.html">Prev</a>┬á</td>
  23.           <th width="60%" align="center" id="sectionname">3.20.┬áSemi-Flatten</th>
  24.           <td width="20%" align="right">┬á<a accesskey="n" href="ch06s03s21.html">Next</a></td>
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  31.         <div>
  32.           <div>
  33.             <h3 class="title"><a id="plug-in-semiflatten"></a>3.20.┬áSemi-Flatten</h3>
  34.           </div>
  35.         </div>
  36.       </div>
  37.       <a id="id3476464" class="indexterm"></a>
  38.       <div class="simplesect" lang="en" xml:lang="en">
  39.         <div class="titlepage">
  40.           <div>
  41.             <div>
  42.               <h4 class="title"><a id="id3476483"></a>Overview</h4>
  43.             </div>
  44.           </div>
  45.         </div>
  46.         <p>
  47.             This filter is found in 
  48.             <span class="guimenuitem">Image>Filters/Colors/<span class="accel">S</span>emi-Flatten</span>
  49.             It is available if your image holds an Alpha channel 
  50.             (Image>Layers/Transparency/Add an alpha channel). 
  51.             Otherwise, it is greyed out.
  52.           </p>
  53.         <p>
  54.             The Semi-flatten filter helps those in need of a solution to anti-aliasing 
  55.             indexed images with transparency. The GIF indexed format supports complete 
  56.             transparency (0 or 255 alpha value), but not semi-transparency (1 - 254): 
  57.             semi-transparent pixels will be transformed to no transparence 
  58.             or complete transparence, ruining anti-aliasing you applied to the logo you 
  59.             want to put onto your Web page.
  60.           </p>
  61.         <p>
  62.            Before applying the filter, it's essential that you should know the background 
  63.            color of your Web page. Use the color-picker to determine the exact color. 
  64.            Click and drag this color from the Web 
  65.            page to the Toolbox ForeGround color. Invert FG/BG colors so that BG color is 
  66.            the same as Web background color.
  67.          </p>
  68.         <p>
  69.            Semi-flatten process will combine FG color to layer (logo) color, 
  70.            proportionally to corresponding alpha values, and will rebuild correct 
  71.            anti-aliasing. Completely transparent pixels will not take the color. Very 
  72.            transparent pixels will take a few color and weakly transparent 
  73.            will take much color.
  74.          </p>
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  77.         <div class="titlepage">
  78.           <div>
  79.             <div>
  80.               <h4 class="title"><a id="id3476545"></a>Options</h4>
  81.             </div>
  82.           </div>
  83.         </div>
  84.         <p>
  85.       This filter has no options.
  86.     </p>
  87.       </div>
  88.     </div>
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  93.           <td width="40%" align="left"><a accesskey="p" href="ch06s03s19.html">Prev</a>┬á</td>
  94.           <td width="20%" align="center">
  95.             <a accesskey="u" href="ch06s03.html">Up</a>
  96.           </td>
  97.           <td width="40%" align="right">┬á<a accesskey="n" href="ch06s03s21.html">Next</a></td>
  98.         </tr>
  99.         <tr>
  100.           <td width="40%" align="left" valign="top">3.19.┬áMax RGB┬á</td>
  101.           <td width="20%" align="center">
  102.             <a accesskey="h" href="index.html">Home</a>
  103.           </td>
  104.           <td width="40%" align="right" valign="top">┬á3.21.┬áSmooth Palette</td>
  105.         </tr>
  106.       </table>
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  108.   </body>
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  110.