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  6.     <title>7.5.¬† Sparkle</title>
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  13.     <link rel="up" href="filters-light-and-shadow.html" title="7.¬† Light and Shadow Filters" />
  14.     <link rel="prev" href="plug-in-lighting.html" title="7.4.¬† Lighting Effects" />
  15.     <link rel="next" href="plug-in-nova.html" title="7.6.¬† Supernova" />
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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">7.5.¬†
  22.     <span lang="en" xml:lang="en">Sparkle</span>
  23.   </th>
  24.         </tr>
  25.         <tr>
  26.           <td width="20%" align="left"><a accesskey="p" href="plug-in-lighting.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  27.           <th width="60%" align="center">7.¬†
  28.     <span lang="en" xml:lang="en">Light and Shadow Filters</span>
  29.   </th>
  30.           <td width="20%" align="right">¬†<a accesskey="n" href="plug-in-nova.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-sparkle"></a>7.5.¬†
  40.     <span lang="en" xml:lang="en">Sparkle</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: 2357 $</td>
  53.                   <td align="left">2007-01-03</td>
  54.                   <td align="left">j.h</td>
  55.                 </tr>
  56.               </table>
  57.             </div>
  58.           </div>
  59.         </div>
  60.       </div>
  61.       <a id="id2744433" class="indexterm"></a>
  62.       <a id="id2744451" 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="id2744460"></a>7.5.1.¬†
  68.       <span lang="en" xml:lang="en">Overview</span>
  69.     </h4>
  70.             </div>
  71.           </div>
  72.         </div>
  73.         <div class="figure">
  74.           <a id="id2744471"></a>
  75.           <p class="title">
  76.             <b>Figure¬†16.81.¬†
  77.         <span lang="en" xml:lang="en">Applying example for the Sparkle filter</span>
  78.       </b>
  79.           </p>
  80.           <div class="figure-contents">
  81.             <div class="mediaobject">
  82.               <img src="../images/filters/examples/taj_orig.jpg" alt="Applying example for the Sparkle filter" />
  83.               <div class="caption">
  84.                 <p>Original image</p>
  85.               </div>
  86.             </div>
  87.             <div class="mediaobject">
  88.               <img src="../images/filters/examples/light-taj-sparkle.jpg" alt="Applying example for the Sparkle filter" />
  89.               <div class="caption">
  90.                 <p>Filter ‚Äú<span class="quote">Sparkle</span>‚Äù applied</p>
  91.               </div>
  92.             </div>
  93.           </div>
  94.         </div>
  95.         <br class="figure-break" />
  96.         <p>
  97.       This filter adds sparkles to your image. It uses the lightest points
  98.       according to a threshold you have determined. It is difficult to foresee
  99.       where sparkles will appear. But you can put white points on your image
  100.       where you want sparkles to be.
  101.     </p>
  102.       </div>
  103.       <div class="sect3" lang="en" xml:lang="en">
  104.         <div class="titlepage">
  105.           <div>
  106.             <div>
  107.               <h4 class="title"><a id="id2744550"></a>7.5.2.¬†
  108.       <span lang="en" xml:lang="en">Activate the filter</span>
  109.     </h4>
  110.             </div>
  111.           </div>
  112.         </div>
  113.         <p>
  114.       This filter is found in the image window menu under
  115.       <span class="guimenu">Filte<span class="accel">r</span>s</span> ‚Üí <span class="guisubmenu"><span class="accel">L</span>ight and Shadow</span> ‚Üí <span class="guimenuitem"><span class="accel">S</span>parkle</span>.
  116.     </p>
  117.       </div>
  118.       <div class="sect3" lang="en" xml:lang="en">
  119.         <div class="titlepage">
  120.           <div>
  121.             <div>
  122.               <h4 class="title"><a id="id2744601"></a>7.5.3.¬†
  123.       <span lang="en" xml:lang="en">Parameter Settings</span>
  124.     </h4>
  125.             </div>
  126.           </div>
  127.         </div>
  128.         <div class="figure">
  129.           <a id="id2744612"></a>
  130.           <p class="title">
  131.             <b>Figure¬†16.82.¬†
  132.         <span lang="en" xml:lang="en">
  133.           ‚Äú<span class="quote">Sparkle</span>‚Äù filter options
  134.         </span>
  135.       </b>
  136.           </p>
  137.           <div class="figure-contents">
  138.             <div class="mediaobject">
  139.               <img src="../images/filters/filters-light-sparkle.png" alt="Sparkle filter options" />
  140.             </div>
  141.           </div>
  142.         </div>
  143.         <br class="figure-break" />
  144.         <p>
  145.       Sliders and input boxes allow you to set values.
  146.     </p>
  147.         <div class="variablelist">
  148.           <dl>
  149.             <dt>
  150.               <span class="term">Preview</span>
  151.             </dt>
  152.             <dd>
  153.               <p>
  154.             Parameter setting results are interactively displayed in preview.
  155.             Scroll bars allow you to move around the image.
  156.           </p>
  157.             </dd>
  158.             <dt>
  159.               <span class="term">Luminosity Threshold</span>
  160.             </dt>
  161.             <dd>
  162.               <p>
  163.             The higher the threshold, the more areas are concerned by
  164.             sparkling (0.0-0.1).
  165.           </p>
  166.             </dd>
  167.             <dt>
  168.               <span class="term">Flare Intensity</span>
  169.             </dt>
  170.             <dd>
  171.               <p>
  172.             When this value increases, the central spot and rays widen
  173.             (0.0-1.0).
  174.           </p>
  175.             </dd>
  176.             <dt>
  177.               <span class="term">Spike Length</span>
  178.             </dt>
  179.             <dd>
  180.               <p>
  181.             This is ray length (1-100). When you reduce it, small spikes
  182.             decrease first.
  183.           </p>
  184.             </dd>
  185.             <dt>
  186.               <span class="term">Spike Points</span>
  187.             </dt>
  188.             <dd>
  189.               <p>
  190.             Number of starting points for spikes (0-16). It's the number of
  191.             big spikes. There is the same number of small spikes. When
  192.             number is odd, small spikes are opposite the big ones. When
  193.             number is even, big spikes are opposite another big spike.
  194.           </p>
  195.             </dd>
  196.             <dt>
  197.               <span class="term">Spike Angle</span>
  198.             </dt>
  199.             <dd>
  200.               <p>
  201.             This is angle of first big spike with horizontal (-1 +360). -1
  202.             determines this value at random.  If a spot has several pixels
  203.             within required threshold, each of them will generate a
  204.             sparkle.  If angle is positive, they will all be
  205.             superimposed. With -1, each sparkle will have a random rotation
  206.             resulting in numerous thin spikes.
  207.           </p>
  208.             </dd>
  209.             <dt>
  210.               <span class="term">Spike Density</span>
  211.             </dt>
  212.             <dd>
  213.               <p>
  214.             This option determines the number of sparkles on your image. It
  215.             indicates the percentage (0.0-1.0) of all possible sparkles that
  216.             will be preserved.
  217.           </p>
  218.             </dd>
  219.             <dt>
  220.               <span class="term">Opacity</span>
  221.             </dt>
  222.             <dd>
  223.               <p>
  224.             When you decrease Opacity (0.0-1.0), sparkles become more
  225.             transparent and the layer beneath becomes visible. If there is no
  226.             other layer, sparkle saturation decreases.
  227.           </p>
  228.             </dd>
  229.             <dt>
  230.               <span class="term">Random Hue</span>
  231.             </dt>
  232.             <dd>
  233.               <p>
  234.             This option should change sparkle hue at random... (0.0-1.0)
  235.           </p>
  236.             </dd>
  237.             <dt>
  238.               <span class="term">Random Saturation</span>
  239.             </dt>
  240.             <dd>
  241.               <p>
  242.             This option should change sparkle saturation at random...
  243.             (0.0-1.0)
  244.           </p>
  245.             </dd>
  246.             <dt>
  247.               <span class="term">Preserve Luminosity</span>
  248.             </dt>
  249.             <dd>
  250.               <p>
  251.             Gives to all central pixels the luminosity of the brightest pixel,
  252.             resulting in increasing the whole sparkle luminosity.
  253.           </p>
  254.             </dd>
  255.             <dt>
  256.               <span class="term">Inverse</span>
  257.             </dt>
  258.             <dd>
  259.               <p>
  260.             Instead of selecting brightest pixels in image, Sparkle will
  261.             select the darkest ones, resulting in dark sparkles.
  262.           </p>
  263.             </dd>
  264.             <dt>
  265.               <span class="term">Add Border</span>
  266.             </dt>
  267.             <dd>
  268.               <p>
  269.             Instead of creating sparkles on brightest pixels, this option
  270.             creates an image border made up of numerous sparkles.
  271.           </p>
  272.             </dd>
  273.             <dt>
  274.               <span class="term">Natural, Foreground, Background Colors</span>
  275.             </dt>
  276.             <dd>
  277.               <p>
  278.             You can change there the color of central pixels. This color will
  279.             be added in Screen mode (Multiply if Inverse is checked). You
  280.             can select between <span class="guilabel">Natural color</span> (the color
  281.             of the pixel in the image), <span class="guilabel">Foreground color
  282.             </span> and <span class="guilabel">Background color</span>.
  283.           </p>
  284.             </dd>
  285.           </dl>
  286.         </div>
  287.       </div>
  288.     </div>
  289.     <div class="navfooter">
  290.       <hr />
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  292.         <tr>
  293.           <td width="40%" align="left"><a accesskey="p" href="plug-in-lighting.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  294.           <td width="20%" align="center">
  295.             <a accesskey="u" href="filters-light-and-shadow.html">
  296.               <img src="../images/up.png" alt="Up" />
  297.             </a>
  298.           </td>
  299.           <td width="40%" align="right">¬†<a accesskey="n" href="plug-in-nova.html"><img src="../images/next.png" alt="Next" /></a></td>
  300.         </tr>
  301.         <tr>
  302.           <td width="40%" align="left" valign="top"><a accesskey="p" href="plug-in-lighting.html">7.4.¬†
  303.     <span lang="en" xml:lang="en">Lighting Effects</span>
  304.   </a>¬†</td>
  305.           <td width="20%" align="center">
  306.             <a accesskey="h" href="index.html">
  307.               <img src="../images/home.png" alt="Home" />
  308.             </a>
  309.           </td>
  310.           <td width="40%" align="right" valign="top">¬†<a accesskey="n" href="plug-in-nova.html">7.6.¬†
  311.     <span lang="en" xml:lang="en">Supernova</span>
  312.   </a></td>
  313.         </tr>
  314.       </table>
  315.     </div>
  316.   </body>
  317. </html>
  318.