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  6.     <title>8.14.¬† Value Propagate</title>
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  20.         <tr>
  21.           <th colspan="3" align="center">8.14.¬†
  22.     <span lang="en" xml:lang="en">Value Propagate</span>
  23.   </th>
  24.         </tr>
  25.         <tr>
  26.           <td width="20%" align="left"><a accesskey="p" href="plug-in-waves.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  27.           <th width="60%" align="center">8.¬†
  28.     <span lang="en" xml:lang="en">Distort Filters</span>
  29.   </th>
  30.           <td width="20%" align="right">¬†<a accesskey="n" href="plug-in-wind.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-vpropagate"></a>8.14.¬†
  40.     <span lang="en" xml:lang="en">Value Propagate</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: 2440 $</td>
  53.                   <td align="left">2007-05-05</td>
  54.                   <td align="left">j.h</td>
  55.                 </tr>
  56.               </table>
  57.             </div>
  58.           </div>
  59.         </div>
  60.       </div>
  61.       <a id="id2753669" class="indexterm"></a>
  62.       <div class="sect3" lang="en" xml:lang="en">
  63.         <div class="titlepage">
  64.           <div>
  65.             <div>
  66.               <h4 class="title"><a id="id2753678"></a>8.14.1.¬†
  67.       <span lang="en" xml:lang="en">Overview</span>
  68.     </h4>
  69.             </div>
  70.           </div>
  71.         </div>
  72.         <div class="figure">
  73.           <a id="id2753689"></a>
  74.           <p class="title">
  75.             <b>Figure¬†16.135.¬†
  76.         <span lang="en" xml:lang="en">Example for the Value Propagate filter</span>
  77.       </b>
  78.           </p>
  79.           <div class="figure-contents">
  80.             <div class="mediaobject">
  81.               <img src="../images/filters/examples/taj_orig.jpg" alt="Example for the Value Propagate filter" />
  82.               <div class="caption">
  83.                 <p>Original image</p>
  84.               </div>
  85.             </div>
  86.             <div class="mediaobject">
  87.               <img src="../images/filters/examples/distort-taj-vpropagate.jpg" alt="Example for the Value Propagate filter" />
  88.               <div class="caption">
  89.                 <p>Filter ‚Äú<span class="quote">Value Propagate</span>‚Äù applied</p>
  90.               </div>
  91.             </div>
  92.           </div>
  93.         </div>
  94.         <br class="figure-break" />
  95.         <p>
  96.       You can find this filter through
  97.       <span class="guimenu">Filters</span> ‚Üí <span class="guisubmenu">Distorts</span> ‚Üí <span class="guimenuitem">Value Propagate</span>.
  98.     </p>
  99.         <p>
  100.       It works on color borders. It spreads pixels that have a Value between
  101.       selected thresholds, in selected directions.
  102.     </p>
  103.       </div>
  104.       <div class="sect3" lang="en" xml:lang="en">
  105.         <div class="titlepage">
  106.           <div>
  107.             <div>
  108.               <h4 class="title"><a id="id2753795"></a>8.14.2.¬†
  109.       <span lang="en" xml:lang="en">Options</span>
  110.     </h4>
  111.             </div>
  112.           </div>
  113.         </div>
  114.         <div class="figure">
  115.           <a id="id2753806"></a>
  116.           <p class="title">
  117.             <b>Figure¬†16.136.¬†
  118.         <span lang="en" xml:lang="en">
  119.           ‚Äú<span class="quote">Value propagate</span>‚Äù filter options
  120.         </span>
  121.       </b>
  122.           </p>
  123.           <div class="figure-contents">
  124.             <div class="mediaobject">
  125.               <img src="../images/filters/filters-distort-vpropagate.png" alt="Value propagate filter options" />
  126.             </div>
  127.           </div>
  128.         </div>
  129.         <br class="figure-break" />
  130.         <div class="variablelist">
  131.           <dl>
  132.             <dt>
  133.               <span class="term">Preview</span>
  134.             </dt>
  135.             <dd>
  136.               <p>
  137.             The result of your settings will appear in the Preview without
  138.             affecting the image until you click on <span class="guibutton">OK</span>.
  139.           </p>
  140.             </dd>
  141.             <dt>
  142.               <span class="term">Propagate Mode</span>
  143.             </dt>
  144.             <dd>
  145.               <p>
  146.             The examples will be about the following image (zoom x8):
  147.           </p>
  148.               <div class="figure">
  149.                 <a id="id2753885"></a>
  150.                 <p class="title">
  151.                   <b>Figure¬†16.137.¬†
  152.               <span lang="en" xml:lang="en">Original image</span>
  153.             </b>
  154.                 </p>
  155.                 <div class="figure-contents">
  156.                   <div class="mediaobject">
  157.                     <img src="../images/filters/examples/vpropag-base.png" alt="Original image" />
  158.                   </div>
  159.                 </div>
  160.               </div>
  161.               <br class="figure-break" />
  162.               <div class="itemizedlist">
  163.                 <ul type="disc">
  164.                   <li>
  165.                     <p>
  166.                 <span class="guilabel">More White</span>: Pixels will be propagated
  167.                 from upper Value pixels towards lower Value pixels. So bright
  168.                 areas will enlarge.
  169.               </p>
  170.                     <div class="figure">
  171.                       <a id="id2753931"></a>
  172.                       <p class="title">
  173.                         <b>Figure¬†16.138.¬†
  174.                   <span lang="en" xml:lang="en">More White</span>
  175.                 </b>
  176.                       </p>
  177.                       <div class="figure-contents">
  178.                         <div class="mediaobject">
  179.                           <img src="../images/filters/examples/vpropag1.png" alt="More White" />
  180.                           <div class="caption">
  181.                             <p>
  182.                       Bright pixels have been propagated to dark pixels in the
  183.                       four directions : top, bottom, right and left. Filter
  184.                       applied several times to increase effect.
  185.                     </p>
  186.                           </div>
  187.                         </div>
  188.                       </div>
  189.                     </div>
  190.                     <br class="figure-break" />
  191.                   </li>
  192.                   <li>
  193.                     <p>
  194.                 <span class="guilabel">More Black</span>: Pixels will be propagated
  195.                 from lower Value pixels towards upper Value pixels. So dark
  196.                 areas will enlarge.
  197.               </p>
  198.                     <div class="figure">
  199.                       <a id="id2753990"></a>
  200.                       <p class="title">
  201.                         <b>Figure¬†16.139.¬†
  202.                   <span lang="en" xml:lang="en">More Black</span>
  203.                 </b>
  204.                       </p>
  205.                       <div class="figure-contents">
  206.                         <div class="mediaobject">
  207.                           <img src="../images/filters/examples/vpropag2.png" alt="More Black" />
  208.                         </div>
  209.                       </div>
  210.                     </div>
  211.                     <br class="figure-break" />
  212.                     <div class="figure">
  213.                       <a id="id2754017"></a>
  214.                       <p class="title">
  215.                         <b>Figure¬†16.140.¬†
  216.                   <span lang="en" xml:lang="en">To bottom only</span>
  217.                 </b>
  218.                       </p>
  219.                       <div class="figure-contents">
  220.                         <div class="mediaobject">
  221.                           <img src="../images/filters/examples/vpropag2-bis.png" alt="To bottom only" />
  222.                           <div class="caption">
  223.                             <p>
  224.                       The same as above with <span class="guilabel">To bottom</span>
  225.                       direction only checked.
  226.                     </p>
  227.                           </div>
  228.                         </div>
  229.                       </div>
  230.                     </div>
  231.                     <br class="figure-break" />
  232.                   </li>
  233.                   <li>
  234.                     <p>
  235.                 <span class="guilabel">Middle Value to Peaks</span>: On a border
  236.                 between the selected thresholds, the average of both values
  237.                 is propagated.
  238.               </p>
  239.                     <div class="figure">
  240.                       <a id="id2754082"></a>
  241.                       <p class="title">
  242.                         <b>Figure¬†16.141.¬†
  243.                   <span lang="en" xml:lang="en">Middle Value to Peaks</span>
  244.                 </b>
  245.                       </p>
  246.                       <div class="figure-contents">
  247.                         <div class="mediaobject">
  248.                           <img src="../images/filters/examples/vpropag3.png" alt="Middle Value to Peaks" />
  249.                           <div class="caption">
  250.                             <p>
  251.                       A thin border with a transitional color has been
  252.                       added to objects. It is not visible around objects
  253.                       with smoothed borders.
  254.                     </p>
  255.                           </div>
  256.                         </div>
  257.                         <div class="mediaobject">
  258.                           <img src="../images/filters/examples/vpropag3-zoom.png" alt="Middle Value to Peaks" />
  259.                           <div class="caption">
  260.                             <p>
  261.                       Green area zoomed x800. A thin border (one pixel wide)
  262.                       has been added. Its value is the average between grey
  263.                       (90%) and green (78%) : (90 + 78) / 2 = 84.
  264.                     </p>
  265.                           </div>
  266.                         </div>
  267.                       </div>
  268.                     </div>
  269.                     <br class="figure-break" />
  270.                   </li>
  271.                   <li>
  272.                     <p>
  273.                 <span class="guilabel">Foreground to Peaks</span>: The propagated areas
  274.                 will be filled with the foreground color of the toolbox.
  275.               </p>
  276.                     <div class="figure">
  277.                       <a id="id2754167"></a>
  278.                       <p class="title">
  279.                         <b>Figure¬†16.142.¬†
  280.                   <span lang="en" xml:lang="en">Foreground to Peaks</span>
  281.                 </b>
  282.                       </p>
  283.                       <div class="figure-contents">
  284.                         <div class="mediaobject">
  285.                           <img src="../images/filters/examples/vpropag4.png" alt="Foreground to Peaks" />
  286.                           <div class="caption">
  287.                             <p>
  288.                       In this example, the foreground color in Toolbox is
  289.                       Red. A thin border, one pixel wide, red, is added
  290.                       around objects. With smoothed objects, this border is
  291.                       located at the furthest limit of smoothing. Here,
  292.                       another border appears inside. This is an artefact due
  293.                       to the small size of the object which makes the
  294.                       smooting area of opposite sides to overlap.
  295.                     </p>
  296.                           </div>
  297.                         </div>
  298.                       </div>
  299.                     </div>
  300.                     <br class="figure-break" />
  301.                   </li>
  302.                   <li>
  303.                     <p>
  304.                 <span class="guilabel">Only Foreground</span>: Only areas with the
  305.                 Toolbox Foreground color will propagate.
  306.               </p>
  307.                     <div class="figure">
  308.                       <a id="id2754230"></a>
  309.                       <p class="title">
  310.                         <b>Figure¬†16.143.¬†
  311.                   <span lang="en" xml:lang="en">Only Foreground</span>
  312.                 </b>
  313.                       </p>
  314.                       <div class="figure-contents">
  315.                         <div class="mediaobject">
  316.                           <img src="../images/filters/examples/vpropag5.png" alt="Only Foreground" />
  317.                           <div class="caption">
  318.                             <p>
  319.                       In this example, the foreground color in Toolbox is
  320.                       that of the green object. After applying filter several
  321.                       times, the green area is clearly enlarged.
  322.                     </p>
  323.                           </div>
  324.                         </div>
  325.                       </div>
  326.                     </div>
  327.                     <br class="figure-break" />
  328.                   </li>
  329.                   <li>
  330.                     <p>
  331.                 <span class="guilabel">Only Background</span>: Only areas with the
  332.                 Background color will propagate.
  333.               </p>
  334.                   </li>
  335.                   <li>
  336.                     <p>
  337.                 <span class="guilabel">More Opaque</span> and <span class="guilabel">More
  338.                 Transparent</span>:
  339.                 These commands work like More White and More Black. Opaque
  340.                 (transparent) areas will be propagated over less opaque
  341.                 (transparent) areas. These commands need an image with an
  342.                 Alpha channel.
  343.               </p>
  344.                     <div class="figure">
  345.                       <a id="id2754313"></a>
  346.                       <p class="title">
  347.                         <b>Figure¬†16.144.¬†
  348.                   <span lang="en" xml:lang="en">More opaque</span>
  349.                 </b>
  350.                       </p>
  351.                       <div class="figure-contents">
  352.                         <div class="mediaobject">
  353.                           <img src="../images/filters/examples/vpropag6a.png" alt="More opaque" />
  354.                           <div class="caption">
  355.                             <p>
  356.                       Original layer, with a transparent background.
  357.                     </p>
  358.                           </div>
  359.                         </div>
  360.                         <div class="mediaobject">
  361.                           <img src="../images/filters/examples/vpropag6b.png" alt="More opaque" />
  362.                           <div class="caption">
  363.                             <p>
  364.                       Filter applied several times: the green, opaque, area
  365.                       got increased.
  366.                     </p>
  367.                           </div>
  368.                         </div>
  369.                       </div>
  370.                     </div>
  371.                     <br class="figure-break" />
  372.                   </li>
  373.                 </ul>
  374.               </div>
  375.             </dd>
  376.             <dt>
  377.               <span class="term">Parameters Settings</span>
  378.             </dt>
  379.             <dd>
  380.               <div class="variablelist">
  381.                 <dl>
  382.                   <dt>
  383.                     <span class="term">Lower / Upper Threshold</span>
  384.                   </dt>
  385.                   <dd>
  386.                     <p>
  387.                   <span class="guilabel">Lower Threshold</span> and <span class="guilabel">Upper
  388.                   Threshold</span>:
  389.                   These commands allow you to set the Value range that will
  390.                   be concerned by Propagate.
  391.                 </p>
  392.                   </dd>
  393.                   <dt>
  394.                     <span class="term">Propagating Rate</span>
  395.                   </dt>
  396.                   <dd>
  397.                     <p>
  398.                   <span class="guilabel">Propagating Rate</span>: That's the
  399.                   propagating amount. The higher it will be the more
  400.                   colored the propagation will be.
  401.                 </p>
  402.                   </dd>
  403.                   <dt>
  404.                     <span class="term">Propagating Direction</span>
  405.                   </dt>
  406.                   <dd>
  407.                     <p>
  408.                   <span class="guilabel">Propagating Direction</span>: You can select
  409.                   one or more directions.
  410.                 </p>
  411.                   </dd>
  412.                 </dl>
  413.               </div>
  414.             </dd>
  415.           </dl>
  416.         </div>
  417.       </div>
  418.     </div>
  419.     <div class="navfooter">
  420.       <hr />
  421.       <table width="100%" summary="Navigation footer">
  422.         <tr>
  423.           <td width="40%" align="left"><a accesskey="p" href="plug-in-waves.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  424.           <td width="20%" align="center">
  425.             <a accesskey="u" href="filters-distort.html">
  426.               <img src="../images/up.png" alt="Up" />
  427.             </a>
  428.           </td>
  429.           <td width="40%" align="right">¬†<a accesskey="n" href="plug-in-wind.html"><img src="../images/next.png" alt="Next" /></a></td>
  430.         </tr>
  431.         <tr>
  432.           <td width="40%" align="left" valign="top"><a accesskey="p" href="plug-in-waves.html">8.13.¬†
  433.     <span lang="en" xml:lang="en">Waves</span>
  434.   </a>¬†</td>
  435.           <td width="20%" align="center">
  436.             <a accesskey="h" href="index.html">
  437.               <img src="../images/home.png" alt="Home" />
  438.             </a>
  439.           </td>
  440.           <td width="40%" align="right" valign="top">¬†<a accesskey="n" href="plug-in-wind.html">8.15.¬†
  441.     <span lang="en" xml:lang="en">Wind</span>
  442.   </a></td>
  443.         </tr>
  444.       </table>
  445.     </div>
  446.   </body>
  447. </html>
  448.