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  4.   <head>
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  6.     <title>5.6.¬† Destripe</title>
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  12.     <link rel="start" href="index.html" title="GNU Image Manipulation Program" />
  13.     <link rel="up" href="filters-enhance.html" title="5.¬† Enhance Filters" />
  14.     <link rel="prev" href="plug-in-red-eye-removal.html" title="5.5.¬† Red Eye Removal" />
  15.     <link rel="next" href="plug-in-unsharp-mask.html" title="5.7.¬† Unsharp Mask" />
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  18.     <div class="navheader">
  19.       <table width="100%" summary="Navigation header">
  20.         <tr>
  21.           <th colspan="3" align="center">5.6.¬†
  22.     <span lang="en" xml:lang="en">Destripe</span>
  23.   </th>
  24.         </tr>
  25.         <tr>
  26.           <td width="20%" align="left"><a accesskey="p" href="plug-in-red-eye-removal.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  27.           <th width="60%" align="center">5.¬†
  28.     <span lang="en" xml:lang="en">Enhance Filters</span>
  29.   </th>
  30.           <td width="20%" align="right">¬†<a accesskey="n" href="plug-in-unsharp-mask.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-destripe"></a>5.6.¬†
  40.     <span lang="en" xml:lang="en">Destripe</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">2006-11-26</td>
  54.                   <td align="left">j.h</td>
  55.                 </tr>
  56.               </table>
  57.             </div>
  58.           </div>
  59.         </div>
  60.       </div>
  61.       <a id="id2738747" class="indexterm"></a>
  62.       <a id="id2738764" 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="id2738773"></a>5.6.1.¬†
  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">Enhance</span> ‚Üí <span class="guimenuitem">Destripe</span>
  76.     </p>
  77.         <p>
  78.       It is used to remove vertical stripes caused by poor quality
  79.       scanners. It works by adding a pattern that will interfere with
  80.       the image, removing stripes if setting is good. This
  81.       ‚Äú<span class="quote">negative</span>‚Äù pattern is calculated from vertical elements
  82.       of the image, so don't be surprised if you see stripes on the
  83.       preview of an image that has none. And if pattern
  84.       ‚Äú<span class="quote">strength</span>‚Äù; is too high, your image will be striped.
  85.     </p>
  86.         <p>
  87.       If, after a first pass, a stripe persists, rectangular-select it
  88.       and apply filter again (all other selection type may worsen the
  89.       result).
  90.     </p>
  91.       </div>
  92.       <div class="sect3" lang="en" xml:lang="en">
  93.         <div class="titlepage">
  94.           <div>
  95.             <div>
  96.               <h4 class="title"><a id="id2738842"></a>5.6.2.¬†
  97.       <span lang="en" xml:lang="en">Options</span>
  98.     </h4>
  99.             </div>
  100.           </div>
  101.         </div>
  102.         <div class="figure">
  103.           <a id="id2738852"></a>
  104.           <p class="title">
  105.             <b>Figure¬†16.49.¬†
  106.         <span lang="en" xml:lang="en">
  107.           ‚Äú<span class="quote">Destripe</span>‚Äù filter options
  108.         </span>
  109.       </b>
  110.           </p>
  111.           <div class="figure-contents">
  112.             <div class="mediaobject">
  113.               <img src="../images/filters/options-enhance-destripe.png" alt="Destripe filter options" />
  114.             </div>
  115.           </div>
  116.         </div>
  117.         <br class="figure-break" />
  118.         <div class="variablelist">
  119.           <dl>
  120.             <dt>
  121.               <span class="term">Preview</span>
  122.             </dt>
  123.             <dd>
  124.               <p>
  125.             Parameter setting results are interactively displayed in preview.
  126.             Scroll bars allow you to move around the image.
  127.           </p>
  128.             </dd>
  129.             <dt>
  130.               <span class="term">Parameter setting</span>
  131.             </dt>
  132.             <dd>
  133.               <div class="itemizedlist">
  134.                 <ul type="disc">
  135.                   <li>
  136.                     <p>
  137.                 <span class="guilabel">Create histogram</span>: This ‚Äú<span class="quote">histogram
  138.                 </span>‚Äù is a black and white image showing the interference
  139.                 pattern more legibly.
  140.               </p>
  141.                   </li>
  142.                   <li>
  143.                     <p>
  144.                 <span class="guilabel">Width</span>: Slider and input box allow
  145.                 to set ‚Äú<span class="quote">strength</span>‚Äù of filter (2-100): more than
  146.                 60 is rarely necessary and may create artifacts.
  147.               </p>
  148.                   </li>
  149.                 </ul>
  150.               </div>
  151.             </dd>
  152.             <dt>
  153.               <span class="term">Create histogram</span>
  154.             </dt>
  155.             <dd>
  156.               <p>
  157.             FIXME
  158.           </p>
  159.             </dd>
  160.           </dl>
  161.         </div>
  162.       </div>
  163.     </div>
  164.     <div class="navfooter">
  165.       <hr />
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  167.         <tr>
  168.           <td width="40%" align="left"><a accesskey="p" href="plug-in-red-eye-removal.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  169.           <td width="20%" align="center">
  170.             <a accesskey="u" href="filters-enhance.html">
  171.               <img src="../images/up.png" alt="Up" />
  172.             </a>
  173.           </td>
  174.           <td width="40%" align="right">¬†<a accesskey="n" href="plug-in-unsharp-mask.html"><img src="../images/next.png" alt="Next" /></a></td>
  175.         </tr>
  176.         <tr>
  177.           <td width="40%" align="left" valign="top"><a accesskey="p" href="plug-in-red-eye-removal.html">5.5.¬†
  178.     <span lang="en" xml:lang="en">Red Eye Removal</span>
  179.   </a>¬†</td>
  180.           <td width="20%" align="center">
  181.             <a accesskey="h" href="index.html">
  182.               <img src="../images/home.png" alt="Home" />
  183.             </a>
  184.           </td>
  185.           <td width="40%" align="right" valign="top">¬†<a accesskey="n" href="plug-in-unsharp-mask.html">5.7.¬†
  186.     <span lang="en" xml:lang="en">Unsharp Mask</span>
  187.   </a></td>
  188.         </tr>
  189.       </table>
  190.     </div>
  191.   </body>
  192. </html>
  193.