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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>
  5.     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
  6.     <title>3.2.¬† Hurl</title>
  7.     <link rel="stylesheet" href="gimp-help-plain.css" type="text/css" />
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  12.     <link rel="start" href="index.html" title="GNU Image Manipulation Program" />
  13.     <link rel="up" href="filters-noise.html" title="3.¬† Noise Filters" />
  14.     <link rel="prev" href="filters-noise.html" title="3.¬† Noise Filters" />
  15.     <link rel="next" href="plug-in-rgb-noise.html" title="3.3.¬† RGB Noise" />
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  17.   <body>
  18.     <div class="navheader">
  19.       <table width="100%" summary="Navigation header">
  20.         <tr>
  21.           <th colspan="3" align="center">3.2.¬†
  22.     <span lang="en" xml:lang="en">Hurl</span>
  23.   </th>
  24.         </tr>
  25.         <tr>
  26.           <td width="20%" align="left"><a accesskey="p" href="filters-noise.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  27.           <th width="60%" align="center">3.¬†
  28.     <span lang="en" xml:lang="en">Noise Filters</span>
  29.   </th>
  30.           <td width="20%" align="right">¬†<a accesskey="n" href="plug-in-rgb-noise.html"><img src="../images/next.png" alt="Next" /></a></td>
  31.         </tr>
  32.       </table>
  33.       <hr />
  34.     </div>
  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-randomize-hurl"></a>3.2.¬†
  40.     <span lang="en" xml:lang="en">Hurl</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: 1993 $</td>
  53.                   <td align="left">2006-11-15</td>
  54.                   <td align="left">j.h</td>
  55.                 </tr>
  56.               </table>
  57.             </div>
  58.           </div>
  59.         </div>
  60.       </div>
  61.       <a id="id2733066" class="indexterm"></a>
  62.       <a id="id2733084" 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="id2733092"></a>3.2.1.¬†
  68.       <span lang="en" xml:lang="en">Overview</span>
  69.     </h4>
  70.             </div>
  71.           </div>
  72.         </div>
  73.         <p>
  74.       You can find this filter through
  75.       <span class="guimenu">Filters</span> ‚Üí <span class="guisubmenu">Noise</span> ‚Üí <span class="guimenuitem"><span class="accel">H</span>url</span>.
  76.     </p>
  77.         <p>
  78.       The Hurl filter changes each affected pixel to a random color, so it
  79.       produces real <span class="emphasis"><em>random noise</em></span>. All color channels,
  80.       including an alpha channel (if it is present) are randomized. All
  81.       possible values are assigned with the same probability. The original
  82.       values are not taken into account. All or only some pixels in an active
  83.       layer or selection are affected, the percentage of affected pixels is
  84.       determined by the <span class="guilabel">Randomization (%)</span> option.
  85.     </p>
  86.       </div>
  87.       <div class="sect3" lang="en" xml:lang="en">
  88.         <div class="titlepage">
  89.           <div>
  90.             <div>
  91.               <h4 class="title"><a id="id2733158"></a>3.2.2.¬†
  92.       <span lang="en" xml:lang="en">Options</span>
  93.     </h4>
  94.             </div>
  95.           </div>
  96.         </div>
  97.         <div class="figure">
  98.           <a id="id2733169"></a>
  99.           <p class="title">
  100.             <b>Figure¬†16.20.¬†
  101.         <span lang="en" xml:lang="en">
  102.           ‚Äú<span class="quote">Hurl</span>‚Äù options
  103.         </span>
  104.       </b>
  105.           </p>
  106.           <div class="figure-contents">
  107.             <div class="mediaobject">
  108.               <img src="../images/filters/filters-noise-hurl.png" alt="Hurl options" />
  109.             </div>
  110.           </div>
  111.         </div>
  112.         <br class="figure-break" />
  113.         <div class="variablelist">
  114.           <dl>
  115.             <dt>
  116.               <span class="term">Random Seed</span>
  117.             </dt>
  118.             <dd>
  119.               <p>
  120.             <span class="guilabel">Random Seed</span> controls randomness of hurl.
  121.             If the same random seed in the same situation is used, the filter
  122.             produces exactly the same results. A different random seed
  123.             produces different results. Random seed can be entered manually
  124.             or generated randomly by pressing <span class="guibutton">New Seed</span>
  125.             button.
  126.           </p>
  127.               <p>
  128.             When the <span class="guilabel">Randomize</span> option is checked, random
  129.             seed cannot be entered manually, but is randomly generated each
  130.             time the filter is run. If it is not checked, the filter remembers
  131.             the last random seed used.
  132.           </p>
  133.             </dd>
  134.             <dt>
  135.               <span class="term">Randomization (%)</span>
  136.             </dt>
  137.             <dd>
  138.               <p>
  139.             The <span class="guibutton">Randomization</span> slider represents the
  140.             percentage of pixels of the active layer or selection which will
  141.             be hurled. The higher value, the more pixels are hurled.
  142.           </p>
  143.             </dd>
  144.             <dt>
  145.               <span class="term">Repeat</span>
  146.             </dt>
  147.             <dd>
  148.               <p>
  149.             The <span class="guilabel">Repeat</span> slider represents the number
  150.             of times the filter will be applied. In the case of the Hurl
  151.             filter it is not very useful, because the same results can be
  152.             obtained faster just by using a higher <span class="guilabel">Randomization
  153.               (%)</span> value.
  154.           </p>
  155.             </dd>
  156.           </dl>
  157.         </div>
  158.       </div>
  159.     </div>
  160.     <div class="navfooter">
  161.       <hr />
  162.       <table width="100%" summary="Navigation footer">
  163.         <tr>
  164.           <td width="40%" align="left"><a accesskey="p" href="filters-noise.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  165.           <td width="20%" align="center">
  166.             <a accesskey="u" href="filters-noise.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-rgb-noise.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="filters-noise.html">3.¬†
  174.     <span lang="en" xml:lang="en">Noise Filters</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-rgb-noise.html">3.3.¬†
  182.     <span lang="en" xml:lang="en">RGB Noise</span>
  183.   </a></td>
  184.         </tr>
  185.       </table>
  186.     </div>
  187.   </body>
  188. </html>
  189.