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  6.     <title>2.4.¬† Selective Gaussian Blur</title>
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  20.         <tr>
  21.           <th colspan="3" align="center">2.4.¬†
  22.     <span lang="en" xml:lang="en">Selective Gaussian Blur</span>
  23.   </th>
  24.         </tr>
  25.         <tr>
  26.           <td width="20%" align="left"><a accesskey="p" href="plug-in-gauss.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  27.           <th width="60%" align="center">2.¬†
  28.     <span lang="en" xml:lang="en">Blur Filters</span>
  29.   </th>
  30.           <td width="20%" align="right">¬†<a accesskey="n" href="plug-in-mblur.html"><img src="../images/next.png" alt="Next" /></a></td>
  31.         </tr>
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  35.     <div class="sect2" lang="en" xml:lang="en">
  36.       <div class="titlepage">
  37.         <div>
  38.           <div>
  39.             <h3 class="title"><a id="plug-in-sel-gauss"></a>2.4.¬†
  40.     <span lang="en" xml:lang="en">Selective Gaussian Blur</span>
  41.   </h3>
  42.           </div>
  43.           <div>
  44.             <div class="revhistory">
  45.               <table border="1" width="100%" summary="Revision history">
  46.                 <tr>
  47.                   <th align="left" valign="top" colspan="3">
  48.                     <b>Revision History</b>
  49.                   </th>
  50.                 </tr>
  51.                 <tr>
  52.                   <td align="left">Revision $Revision: 2217 $</td>
  53.                   <td align="left">2006-10-23</td>
  54.                   <td align="left">j.h</td>
  55.                 </tr>
  56.               </table>
  57.             </div>
  58.           </div>
  59.         </div>
  60.       </div>
  61.       <a id="id2731314" class="indexterm"></a>
  62.       <a id="id2731331" class="indexterm"></a>
  63.       <div class="sect3" lang="en" xml:lang="en">
  64.         <div class="titlepage">
  65.           <div>
  66.             <div>
  67.               <h4 class="title"><a id="id2731340"></a>2.4.1.¬†
  68.       <span lang="en" xml:lang="en">Overview</span>
  69.     </h4>
  70.             </div>
  71.           </div>
  72.         </div>
  73.         <div class="figure">
  74.           <a id="id2731351"></a>
  75.           <p class="title">
  76.             <b>Figure¬†16.11.¬†
  77.         <span lang="en" xml:lang="en">The Selective Gaussian Blur filter</span>
  78.       </b>
  79.           </p>
  80.           <div class="figure-contents">
  81.             <div class="mediaobject">
  82.               <img src="../images/filters/examples/taj_orig.jpg" alt="The Selective Gaussian Blur filter" />
  83.               <div class="caption">
  84.                 <p>Original</p>
  85.               </div>
  86.             </div>
  87.             <div class="mediaobject">
  88.               <img src="../images/filters/examples/blur-taj-selective.jpg" alt="The Selective Gaussian Blur filter" />
  89.               <div class="caption">
  90.                 <p>Blur applied</p>
  91.               </div>
  92.             </div>
  93.           </div>
  94.         </div>
  95.         <br class="figure-break" />
  96.         <p>
  97.       You can find this filter in the image menu under
  98.       <span class="guimenu">Filte<span class="accel">r</span>s</span> ‚Üí <span class="guisubmenu"><span class="accel">B</span>lur</span> ‚Üí <span class="guimenuitem"><span class="accel">S</span>elective Gaussian Blur</span>
  99.     </p>
  100.         <p>
  101.       Contrary to the other blur plug-ins, the Selective Gaussian Blur plug-in
  102.       doesn't act on all pixels: blur is applied only if the difference
  103.       between its value and the value of the surrounding pixels is less than a
  104.       defined Delta value. So, contrasts are preserved because difference is
  105.       high on contrast limits. It is used to blur a background so that the
  106.       foreground subject will stand out better. This add a sense of depth to
  107.       the image with only a single operation.
  108.     </p>
  109.       </div>
  110.       <div class="sect3" lang="en" xml:lang="en">
  111.         <div class="titlepage">
  112.           <div>
  113.             <div>
  114.               <h4 class="title"><a id="id2731463"></a>2.4.2.¬†
  115.       <span lang="en" xml:lang="en">Options</span>
  116.     </h4>
  117.             </div>
  118.           </div>
  119.         </div>
  120.         <div class="figure">
  121.           <a id="id2731474"></a>
  122.           <p class="title">
  123.             <b>Figure¬†16.12.¬†
  124.         <span lang="en" xml:lang="en">
  125.             ‚Äú<span class="quote">Selective Gaussian</span>‚Äù filter parateters settings
  126.         </span>
  127.       </b>
  128.           </p>
  129.           <div class="figure-contents">
  130.             <div class="mediaobject">
  131.               <img src="../images/filters/filters-blur-gaussselect.png" alt="Selective Gaussian filter parateters settings" />
  132.             </div>
  133.           </div>
  134.         </div>
  135.         <br class="figure-break" />
  136.         <div class="variablelist">
  137.           <dl>
  138.             <dt>
  139.               <span class="term">Blur Radius</span>
  140.             </dt>
  141.             <dd>
  142.               <p>
  143.             Here you can set the blur intensity, in pixels.
  144.           </p>
  145.             </dd>
  146.             <dt>
  147.               <span class="term">Max. Delta</span>
  148.             </dt>
  149.             <dd>
  150.               <p>
  151.             Here you can set the maximum difference (0-255) between the
  152.             pixel value and the surrounding pixel values. Above this Delta,
  153.             blur will not be applied to that pixel.
  154.           </p>
  155.             </dd>
  156.           </dl>
  157.         </div>
  158.       </div>
  159.     </div>
  160.     <div class="navfooter">
  161.       <hr />
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  163.         <tr>
  164.           <td width="40%" align="left"><a accesskey="p" href="plug-in-gauss.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  165.           <td width="20%" align="center">
  166.             <a accesskey="u" href="filters-blur.html">
  167.               <img src="../images/up.png" alt="Up" />
  168.             </a>
  169.           </td>
  170.           <td width="40%" align="right">¬†<a accesskey="n" href="plug-in-mblur.html"><img src="../images/next.png" alt="Next" /></a></td>
  171.         </tr>
  172.         <tr>
  173.           <td width="40%" align="left" valign="top"><a accesskey="p" href="plug-in-gauss.html">2.3.¬†
  174.     <span lang="en" xml:lang="en">Gaussian Blur</span>
  175.   </a>¬†</td>
  176.           <td width="20%" align="center">
  177.             <a accesskey="h" href="index.html">
  178.               <img src="../images/home.png" alt="Home" />
  179.             </a>
  180.           </td>
  181.           <td width="40%" align="right" valign="top">¬†<a accesskey="n" href="plug-in-mblur.html">2.5.¬†
  182.     <span lang="en" xml:lang="en">Motion Blur</span>
  183.   </a></td>
  184.         </tr>
  185.       </table>
  186.     </div>
  187.   </body>
  188. </html>
  189.