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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">
  3. <html xmlns="http://www.w3.org/1999/xhtml">
  4.   <head>
  5.     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
  6.     <title>5.5.┬áSobel</title>
  7.     <link rel="stylesheet" href="gimp-help-plain.css" type="text/css" />
  8.     <link rel="stylesheet" href="gimp-help-screen.css" type="text/css" />
  9.     <meta name="generator" content="DocBook XSL Stylesheets V1.66.1" />
  10.     <link rel="start" href="index.html" title="GIMP User Manual" />
  11.     <link rel="up" href="ch06s05.html" title="5.┬áEdge-detect filters" />
  12.     <link rel="prev" href="ch06s05s04.html" title="5.4.┬áLaplace" />
  13.     <link rel="next" href="ch06s06.html" title="6.┬áEnhance 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">5.┬áEdge-detect filters</th>
  20.         </tr>
  21.         <tr>
  22.           <td width="20%" align="left"><a accesskey="p" href="ch06s05s04.html">Prev</a>┬á</td>
  23.           <th width="60%" align="center" id="sectionname">5.5.┬áSobel</th>
  24.           <td width="20%" align="right">┬á<a accesskey="n" href="ch06s06.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-sobel"></a>5.5.┬áSobel</h3>
  34.           </div>
  35.         </div>
  36.       </div>
  37.       <a id="id3478327" class="indexterm"></a>
  38.       <div class="mediaobject">
  39.         <img src="../images/filters/filters-edgedetect-sobel.png" />
  40.       </div>
  41.       <div class="simplesect" lang="en" xml:lang="en">
  42.         <div class="titlepage">
  43.           <div>
  44.             <div>
  45.               <h4 class="title"><a id="id3478348"></a>Overview</h4>
  46.             </div>
  47.           </div>
  48.         </div>
  49.         <p>
  50.       This filter is found in 
  51.       <span class="guimenuitem">Image>Filters/Edge detect/<span class="accel">S</span>obel</span>
  52.     </p>
  53.       </div>
  54.       <div class="simplesect" lang="en" xml:lang="en">
  55.         <div class="titlepage">
  56.           <div>
  57.             <div>
  58.               <h4 class="title"><a id="id3478371"></a>Options</h4>
  59.             </div>
  60.           </div>
  61.         </div>
  62.         <div class="variablelist">
  63.           <dl>
  64.             <dt>
  65.               <span class="term">Parameters Settings</span>
  66.             </dt>
  67.             <dd>
  68.               <p>
  69.             </p>
  70.               <div class="itemizedlist">
  71.                 <ul type="disc">
  72.                   <li>
  73.                     <p>
  74.                 <span class="guilabel">Horizontally</span>: Only near horizontal edges are displayed.
  75.               </p>
  76.                   </li>
  77.                   <li>
  78.                     <p>
  79.                 <span class="guilabel">Vertically</span>: Only near vertical edges are displayed.
  80.               </p>
  81.                   </li>
  82.                   <li>
  83.                     <p>
  84.                 <span class="guilabel">Keep sign of result</span>: (Only if one direction is selected): 
  85.                 When this option is checked, opposite edges have opposite color (red-cyan, 
  86.                 blue-yellow, green-magenta, black-white). With grey level images this results 
  87.                 in a flat relief with bumps and hollows.
  88.               </p>
  89.                   </li>
  90.                 </ul>
  91.               </div>
  92.               <p>
  93.           </p>
  94.             </dd>
  95.           </dl>
  96.         </div>
  97.       </div>
  98.     </div>
  99.     <div class="navfooter">
  100.       <hr />
  101.       <table width="100%" summary="Navigation footer">
  102.         <tr>
  103.           <td width="40%" align="left"><a accesskey="p" href="ch06s05s04.html">Prev</a>┬á</td>
  104.           <td width="20%" align="center">
  105.             <a accesskey="u" href="ch06s05.html">Up</a>
  106.           </td>
  107.           <td width="40%" align="right">┬á<a accesskey="n" href="ch06s06.html">Next</a></td>
  108.         </tr>
  109.         <tr>
  110.           <td width="40%" align="left" valign="top">5.4.┬áLaplace┬á</td>
  111.           <td width="20%" align="center">
  112.             <a accesskey="h" href="index.html">Home</a>
  113.           </td>
  114.           <td width="40%" align="right" valign="top">┬á6.┬áEnhance filters</td>
  115.         </tr>
  116.       </table>
  117.     </div>
  118.   </body>
  119. </html>
  120.