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  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>
  5.     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
  6.     <title>2.2.┬áBlur</title>
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  10.     <link rel="start" href="index.html" title="GIMP User Manual" />
  11.     <link rel="up" href="ch06s02.html" title="2.┬áBlur filters" />
  12.     <link rel="prev" href="ch06s02.html" title="2.┬áBlur filters" />
  13.     <link rel="next" href="ch06s02s03.html" title="2.3.┬áGaussian Blur" />
  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">2.┬áBlur filters</th>
  20.         </tr>
  21.         <tr>
  22.           <td width="20%" align="left"><a accesskey="p" href="ch06s02.html">Prev</a>┬á</td>
  23.           <th width="60%" align="center" id="sectionname">2.2.┬áBlur</th>
  24.           <td width="20%" align="right">┬á<a accesskey="n" href="ch06s02s03.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-blur"></a>2.2.┬áBlur</h3>
  34.           </div>
  35.         </div>
  36.       </div>
  37.       <a id="id3471993" class="indexterm"></a>
  38.       <div class="mediaobject">
  39.         <img src="../images/filters/filters-blur-blur.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="id3472020"></a>Overview</h4>
  46.             </div>
  47.           </div>
  48.         </div>
  49.         <p>
  50.       The Blur filter produces an effect similar to that of an out of
  51.       focus camera shot. To produce this blur effect, the filter takes
  52.       the average of the present pixel value and the value of adjacent
  53.       pixels and sets the present pixel to that average value. All
  54.       pixels of the active layer or selection are not concerned by
  55.       blurring. For each pixel, a random number is generated based on
  56.       the seed value and compared against the randomization percentage.
  57.       If the random value is less than the randomization percentage,
  58.       then the pixel is blurred. A 100% randomization, blurs all the
  59.       pixels and blurred pixel number is at the most equal to
  60.       randomization percentage.
  61.     </p>
  62.       </div>
  63.       <div class="simplesect" lang="en" xml:lang="en">
  64.         <div class="titlepage">
  65.           <div>
  66.             <div>
  67.               <h4 class="title"><a id="id3472044"></a>Activate the dialog</h4>
  68.             </div>
  69.           </div>
  70.         </div>
  71.         <p>
  72.       This filter can be called from the image menu:
  73.       <span class="guimenuitem">Filters</span>/
  74.       <span class="guimenuitem">Blur</span>/
  75.       <span class="guimenuitem"><span class="accel">B</span>lur</span>
  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="id3472079"></a>Options</h4>
  83.             </div>
  84.           </div>
  85.         </div>
  86.         <div class="variablelist">
  87.           <dl>
  88.             <dt>
  89.               <span class="term">Random Seed</span>
  90.             </dt>
  91.             <dd>
  92.               <p>
  93.             <span class="guilabel">Random Seed</span> controls the randomization
  94.             element of the blur. The <span class="guibutton">Time</span> button will
  95.             set the seed using the hardware clock of the computer. Using
  96.             <span class="guibutton">Time</span> is the preferred method for
  97.             initializing Blur as it will provide a higher chance of differing
  98.             values over many uses.
  99.           </p>
  100.             </dd>
  101.             <dt>
  102.               <span class="term">Randomization %</span>
  103.             </dt>
  104.             <dd>
  105.               <p>
  106.             The <span class="guilabel">Randomization</span> slider represents
  107.             the percentage of pixels of the active layer or selection
  108.             which may be blurred. Higher value result in more blurring.
  109.           </p>
  110.             </dd>
  111.             <dt>
  112.               <span class="term">Repeat</span>
  113.             </dt>
  114.             <dd>
  115.               <p>
  116.             The <span class="guilabel">Repeat</span> slider represents the
  117.             number of times the active layer will be blurred. Higher
  118.             values result in more blurring.
  119.           </p>
  120.             </dd>
  121.           </dl>
  122.         </div>
  123.       </div>
  124.     </div>
  125.     <div class="navfooter">
  126.       <hr />
  127.       <table width="100%" summary="Navigation footer">
  128.         <tr>
  129.           <td width="40%" align="left"><a accesskey="p" href="ch06s02.html">Prev</a>┬á</td>
  130.           <td width="20%" align="center">
  131.             <a accesskey="u" href="ch06s02.html">Up</a>
  132.           </td>
  133.           <td width="40%" align="right">┬á<a accesskey="n" href="ch06s02s03.html">Next</a></td>
  134.         </tr>
  135.         <tr>
  136.           <td width="40%" align="left" valign="top">2.┬áBlur filters┬á</td>
  137.           <td width="20%" align="center">
  138.             <a accesskey="h" href="index.html">Home</a>
  139.           </td>
  140.           <td width="40%" align="right" valign="top">┬á2.3.┬áGaussian Blur</td>
  141.         </tr>
  142.       </table>
  143.     </div>
  144.   </body>
  145. </html>
  146.