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  6.     <title>11.31.¬† Border Average</title>
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  13.     <link rel="up" href="gimp-imagewindow-menus-colors.html" title="11.¬† The ‚ÄúColors‚Äù Menu" />
  14.     <link rel="prev" href="gimp-imagewindow-menus-colors-info-histogram.html" title="11.30.¬† Histogram" />
  15.     <link rel="next" href="plug-in-ccanalyze.html" title="11.32.¬† Colorcube Analysis" />
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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">11.31.¬†
  22.     <span lang="en" xml:lang="en">Border Average</span>
  23.   </th>
  24.         </tr>
  25.         <tr>
  26.           <td width="20%" align="left"><a accesskey="p" href="gimp-imagewindow-menus-colors-info-histogram.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  27.           <th width="60%" align="center">11.¬†
  28.     <span lang="en" xml:lang="en">The ‚Äú<span class="quote">Colors</span>‚Äù Menu</span>
  29.   </th>
  30.           <td width="20%" align="right">¬†<a accesskey="n" href="plug-in-ccanalyze.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-borderaverage"></a>11.31.¬†
  40.     <span lang="en" xml:lang="en">Border Average</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: 2438 $</td>
  53.                   <td align="left">2007-10-22</td>
  54.                   <td align="left">ude</td>
  55.                 </tr>
  56.               </table>
  57.             </div>
  58.           </div>
  59.         </div>
  60.       </div>
  61.       <a id="id2725464" class="indexterm"></a>
  62.       <a id="id2725479" 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="id2725488"></a>11.31.1.¬†
  68.       <span lang="en" xml:lang="en">Overview</span>
  69.     </h4>
  70.             </div>
  71.           </div>
  72.         </div>
  73.         <div class="figure">
  74.           <a id="id2725498"></a>
  75.           <p class="title">
  76.             <b>Figure¬†15.185.¬†
  77.         <span lang="en" xml:lang="en">
  78.           Example for the ‚Äú<span class="quote">Border Average</span>‚Äù filter
  79.         </span>
  80.       </b>
  81.           </p>
  82.           <div class="figure-contents">
  83.             <div class="mediaobject">
  84.               <img src="../images/filters/examples/taj_orig.png" alt="Example for the Border Average filter" />
  85.               <div class="caption">
  86.                 <p>Original image</p>
  87.               </div>
  88.             </div>
  89.             <div class="mediaobject">
  90.               <img src="../images/filters/examples/color-taj-borderaverage.png" alt="Example for the Border Average filter" />
  91.               <div class="caption">
  92.                 <p>Filter ‚Äú<span class="quote">Border Average</span>‚Äù applied</p>
  93.               </div>
  94.             </div>
  95.           </div>
  96.         </div>
  97.         <br class="figure-break" />
  98.         <p>
  99.       This plug-in calculates the most often used color in a specified border
  100.       of the the active layer or selection, allowing a specified range to not
  101.       be exact. The calculated color becomes the foreground color in the
  102.       Toolbox. This filter is interesting when you have to find a Web page
  103.       color background that differs as little as possible from your image
  104.       border. The action of this filter is not registered in Undo History
  105.       and can't be deleted with Ctrl+Z.
  106.     </p>
  107.       </div>
  108.       <div class="sect3" lang="en" xml:lang="en">
  109.         <div class="titlepage">
  110.           <div>
  111.             <div>
  112.               <h4 class="title"><a id="id2725585"></a>11.31.2.¬†
  113.       <span lang="en" xml:lang="en">Activate the filter</span>
  114.     </h4>
  115.             </div>
  116.           </div>
  117.         </div>
  118.         <p>
  119.       This filter is found in the image window menu under
  120.       <span class="guimenu">Colors</span> ‚Üí <span class="guimenuitem"><span class="accel">B</span>order Average</span>.
  121.     </p>
  122.       </div>
  123.       <div class="sect3" lang="en" xml:lang="en">
  124.         <div class="titlepage">
  125.           <div>
  126.             <div>
  127.               <h4 class="title"><a id="id2725625"></a>11.31.3.¬†
  128.       <span lang="en" xml:lang="en">Options</span>
  129.     </h4>
  130.             </div>
  131.           </div>
  132.         </div>
  133.         <div class="figure">
  134.           <a id="id2725636"></a>
  135.           <p class="title">
  136.             <b>Figure¬†15.186.¬†
  137.         <span lang="en" xml:lang="en">
  138.           Options of the ‚Äú<span class="quote">Border Average Filter</span>‚Äù
  139.         </span>
  140.       </b>
  141.           </p>
  142.           <div class="figure-contents">
  143.             <div class="mediaobject">
  144.               <img src="../images/filters/filters-color-borderaverage.png" alt="Options of the Border Average Filter" />
  145.             </div>
  146.           </div>
  147.         </div>
  148.         <br class="figure-break" />
  149.         <div class="variablelist">
  150.           <dl>
  151.             <dt>
  152.               <span class="term">Border Size</span>
  153.             </dt>
  154.             <dd>
  155.               <p>
  156.             You can set there the border <span class="guilabel">Thickness</span> in
  157.             pixels.
  158.           </p>
  159.             </dd>
  160.             <dt>
  161.               <span class="term">Number of Colors</span>
  162.             </dt>
  163.             <dd>
  164.               <p>
  165.             The <span class="guilabel">Bucket Size</span> lets you control the number
  166.             of colors considered as similar and counted with the same
  167.             ‚Äú<span class="quote">bucket</span>‚Äù. A low bucket size value (i.e. a high bucket
  168.             number) gives you better precision in the calculation of the
  169.             average color. Note that better precision does not necessarily
  170.             mean better results (see example below).
  171.           </p>
  172.             </dd>
  173.           </dl>
  174.         </div>
  175.       </div>
  176.       <div class="sect3" lang="en" xml:lang="en">
  177.         <div class="titlepage">
  178.           <div>
  179.             <div>
  180.               <h4 class="title"><a id="id2725733"></a>11.31.4.¬†
  181.       <span lang="en" xml:lang="en">
  182.         Examples illustrating the ‚Äú<span class="quote">Border Average</span>‚Äù filter
  183.       </span>
  184.     </h4>
  185.             </div>
  186.           </div>
  187.         </div>
  188.         <div class="figure">
  189.           <a id="id2725750"></a>
  190.           <p class="title">
  191.             <b>Figure¬†15.187.¬†
  192.         <span lang="en" xml:lang="en">Original image</span>
  193.       </b>
  194.           </p>
  195.           <div class="figure-contents">
  196.             <div class="mediaobject">
  197.               <img src="../images/filters/examples/borderaverage.png" alt="Original image" />
  198.               <div class="caption">
  199.                 <p>
  200.             Original image: colors are pure Red (255;0;0), pure Blue
  201.             (0;0;255), and different but similar kinds of Green
  202.             (00******;11******;00******).
  203.           </p>
  204.               </div>
  205.             </div>
  206.           </div>
  207.         </div>
  208.         <br class="figure-break" />
  209.         <div class="figure">
  210.           <a id="id2725789"></a>
  211.           <p class="title">
  212.             <b>Figure¬†15.188.¬†
  213.         <span lang="en" xml:lang="en">
  214.           ‚Äú<span class="quote">Number of Colors</span>‚Äù is set to 8:
  215.         </span>
  216.       </b>
  217.           </p>
  218.           <div class="figure-contents">
  219.             <div class="mediaobject">
  220.               <img src="../images/filters/examples/borderaverage08.png" alt="Number of Colors is set to 8:" />
  221.               <div class="caption">
  222.                 <p>
  223.             The resulting color is a Red (254,2,2).
  224.           </p>
  225.               </div>
  226.             </div>
  227.           </div>
  228.         </div>
  229.         <br class="figure-break" />
  230.         <p>
  231.       The most frequent color on the image border is pure Red (255,0,0).
  232.       Since the bucket size is low, the different Green tones are not
  233.       recognized as the same color. The resulting color is a nearly pure
  234.       Red (254,2,2) and becomes the foreground color of the Toolbox.
  235.       </p>
  236.         <div class="figure">
  237.           <a id="id2725842"></a>
  238.           <p class="title">
  239.             <b>Figure¬†15.189.¬†
  240.         <span lang="en" xml:lang="en">
  241.           ‚Äú<span class="quote">Number of Colors</span>‚Äù is set to 64:
  242.         </span>
  243.       </b>
  244.           </p>
  245.           <div class="figure-contents">
  246.             <div class="mediaobject">
  247.               <img src="../images/filters/examples/borderaverage64.png" alt="Number of Colors is set to 64:" />
  248.               <div class="caption">
  249.                 <p>
  250.             The resulting color is Green (32,224,32).
  251.           </p>
  252.               </div>
  253.             </div>
  254.           </div>
  255.         </div>
  256.         <br class="figure-break" />
  257.         <p> 
  258.       Here the bucket size is high, the number of buckets low. The
  259.       filter looks at only the two most significant bits of every color
  260.       channel value. Now Green (0-63,192-255,0-63) is the most frequent
  261.       color. The resulting color is Green (32,224,32), which is the
  262.       average of all colors possibly counted by this
  263.       ‚Äú<span class="quote">bucket</span>‚Äù.
  264.     </p>
  265.       </div>
  266.     </div>
  267.     <div class="navfooter">
  268.       <hr />
  269.       <table width="100%" summary="Navigation footer">
  270.         <tr>
  271.           <td width="40%" align="left"><a accesskey="p" href="gimp-imagewindow-menus-colors-info-histogram.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  272.           <td width="20%" align="center">
  273.             <a accesskey="u" href="gimp-imagewindow-menus-colors.html">
  274.               <img src="../images/up.png" alt="Up" />
  275.             </a>
  276.           </td>
  277.           <td width="40%" align="right">¬†<a accesskey="n" href="plug-in-ccanalyze.html"><img src="../images/next.png" alt="Next" /></a></td>
  278.         </tr>
  279.         <tr>
  280.           <td width="40%" align="left" valign="top"><a accesskey="p" href="gimp-imagewindow-menus-colors-info-histogram.html">11.30.¬†
  281.     <span lang="en" xml:lang="en">Histogram</span>
  282.   </a>¬†</td>
  283.           <td width="20%" align="center">
  284.             <a accesskey="h" href="index.html">
  285.               <img src="../images/home.png" alt="Home" />
  286.             </a>
  287.           </td>
  288.           <td width="40%" align="right" valign="top">¬†<a accesskey="n" href="plug-in-ccanalyze.html">11.32.¬†
  289.     <span lang="en" xml:lang="en">Colorcube Analysis</span>
  290.   </a></td>
  291.         </tr>
  292.       </table>
  293.     </div>
  294.   </body>
  295. </html>
  296.