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  1. <?xml version="1.0" encoding="UTF-8" standalone="no"?>
  2. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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  4.   <head>
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  6.     <title>7.4.┬áErode</title>
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  10.     <link rel="start" href="index.html" title="GIMP User Manual" />
  11.     <link rel="up" href="ch06s07.html" title="7.┬áGeneric filters" />
  12.     <link rel="prev" href="ch06s07s03.html" title="7.3.┬áDilate" />
  13.     <link rel="next" href="ch06s08.html" title="8.┬áGlass Effects filters" />
  14.   </head>
  15.   <body>
  16.     <div xmlns="" class="navheader">
  17.       <table width="100%" summary="Navigation header">
  18.         <tr>
  19.           <th colspan="3" align="center" id="chaptername">7.┬áGeneric filters</th>
  20.         </tr>
  21.         <tr>
  22.           <td width="20%" align="left"><a accesskey="p" href="ch06s07s03.html">Prev</a>┬á</td>
  23.           <th width="60%" align="center" id="sectionname">7.4.┬áErode</th>
  24.           <td width="20%" align="right">┬á<a accesskey="n" href="ch06s08.html">Next</a></td>
  25.         </tr>
  26.       </table>
  27.       <hr />
  28.     </div>
  29.     <div class="sect2" lang="en" xml:lang="en">
  30.       <div class="titlepage">
  31.         <div>
  32.           <div>
  33.             <h3 class="title"><a id="plug-in-erode"></a>7.4.┬áErode</h3>
  34.           </div>
  35.         </div>
  36.       </div>
  37.       <a id="id3480595" 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="id3480615"></a>Overview</h4>
  43.             </div>
  44.           </div>
  45.         </div>
  46.         <p>
  47.             This filter is found in 
  48.             <span class="guimenuitem">Image>Filters/Generic/E<span class="accel">r</span>ode</span>  
  49.           </p>
  50.         <p>
  51.             This filter widens and enhances bright areas of the active layer or selection.
  52.           </p>
  53.         <p>
  54.             For every image pixel, it brings the pixel Value (luminosity) into line with 
  55.             the upper Value (the brightest) of the 8 neighbouring pixels (3x3 matrix). So, 
  56.             a bright pixel is added around bright areas. An isolated pixel on a darker 
  57.             background will be changed to a big "pixel", composed of 9 pixels, and that will 
  58.             create some noise in the image. A larger bright area will dilate by one pixel in 
  59.             all directions.
  60.           </p>
  61.         <p>
  62.             On more complex images, bright areas are widenned and enhanced the same, and 
  63.             somewhat pixellated.
  64.           </p>
  65.       </div>
  66.       <div class="simplesect" lang="en" xml:lang="en">
  67.         <div class="titlepage">
  68.           <div>
  69.             <div>
  70.               <h4 class="title"><a id="id3480666"></a>Options</h4>
  71.             </div>
  72.           </div>
  73.         </div>
  74.         <p>
  75.       This filter has no option.
  76.     </p>
  77.       </div>
  78.       <div class="simplesect" lang="en" xml:lang="en">
  79.         <div class="titlepage">
  80.           <div>
  81.             <div>
  82.               <h4 class="title"><a id="id3480678"></a>Example</h4>
  83.             </div>
  84.           </div>
  85.         </div>
  86.         <div class="variablelist">
  87.           <dl>
  88.             <dt>
  89.               <span class="term">Erode noise</span>
  90.             </dt>
  91.             <dd>
  92.               <div class="mediaobject">
  93.                 <img src="../images/filters/examples/erode-noise.png" />
  94.               </div>
  95.             </dd>
  96.           </dl>
  97.         </div>
  98.       </div>
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  100.     <div class="navfooter">
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  102.       <table width="100%" summary="Navigation footer">
  103.         <tr>
  104.           <td width="40%" align="left"><a accesskey="p" href="ch06s07s03.html">Prev</a>┬á</td>
  105.           <td width="20%" align="center">
  106.             <a accesskey="u" href="ch06s07.html">Up</a>
  107.           </td>
  108.           <td width="40%" align="right">┬á<a accesskey="n" href="ch06s08.html">Next</a></td>
  109.         </tr>
  110.         <tr>
  111.           <td width="40%" align="left" valign="top">7.3.┬áDilate┬á</td>
  112.           <td width="20%" align="center">
  113.             <a accesskey="h" href="index.html">Home</a>
  114.           </td>
  115.           <td width="40%" align="right" valign="top">┬á8.┬áGlass Effects filters</td>
  116.         </tr>
  117.       </table>
  118.     </div>
  119.   </body>
  120. </html>
  121.