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  4.   <head>
  5.     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
  6.     <title>2.5.¬† Motion Blur</title>
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  12.     <link rel="start" href="index.html" title="GNU Image Manipulation Program" />
  13.     <link rel="up" href="filters-blur.html" title="2.¬† Blur Filters" />
  14.     <link rel="prev" href="plug-in-sel-gauss.html" title="2.4.¬† Selective Gaussian Blur" />
  15.     <link rel="next" href="plug-in-pixelize.html" title="2.6.¬† Pixelise" />
  16.   </head>
  17.   <body>
  18.     <div class="navheader">
  19.       <table width="100%" summary="Navigation header">
  20.         <tr>
  21.           <th colspan="3" align="center">2.5.¬†
  22.     <span lang="en" xml:lang="en">Motion Blur</span>
  23.   </th>
  24.         </tr>
  25.         <tr>
  26.           <td width="20%" align="left"><a accesskey="p" href="plug-in-sel-gauss.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  27.           <th width="60%" align="center">2.¬†
  28.     <span lang="en" xml:lang="en">Blur Filters</span>
  29.   </th>
  30.           <td width="20%" align="right">¬†<a accesskey="n" href="plug-in-pixelize.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-mblur"></a>2.5.¬†
  40.     <span lang="en" xml:lang="en">Motion Blur</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: 1914 $</td>
  53.                   <td align="left">2006-10-23</td>
  54.                   <td align="left">j.h</td>
  55.                 </tr>
  56.               </table>
  57.             </div>
  58.           </div>
  59.         </div>
  60.       </div>
  61.       <a id="id2731597" class="indexterm"></a>
  62.       <a id="id2731615" class="indexterm"></a>
  63.       <div class="mediaobject">
  64.         <img src="../images/filters/filters-blur-mblur.png" />
  65.       </div>
  66.       <div class="sect3" lang="en" xml:lang="en">
  67.         <div class="titlepage">
  68.           <div>
  69.             <div>
  70.               <h4 class="title"><a id="id2731641"></a>2.5.1.¬†
  71.       <span lang="en" xml:lang="en">Overview</span>
  72.     </h4>
  73.             </div>
  74.           </div>
  75.         </div>
  76.         <div class="figure">
  77.           <a id="id2731652"></a>
  78.           <p class="title">
  79.             <b>Figure¬†16.13.¬†
  80.         <span lang="en" xml:lang="en">
  81.           Starting example for Motion Blur filter
  82.         </span>
  83.       </b>
  84.           </p>
  85.           <div class="figure-contents">
  86.             <div class="mediaobject">
  87.               <img src="../images/filters/examples/taj_orig.jpg" alt="Starting example for Motion Blur filter" />
  88.               <div class="caption">
  89.                 <p>Original image</p>
  90.               </div>
  91.             </div>
  92.             <div class="mediaobject">
  93.               <img src="../images/filters/examples/blur-taj-mblur-linear.jpg" alt="Starting example for Motion Blur filter" />
  94.               <div class="caption">
  95.                 <p>Linear blur</p>
  96.               </div>
  97.             </div>
  98.           </div>
  99.         </div>
  100.         <br class="figure-break" />
  101.         <div class="figure">
  102.           <a id="id2731713"></a>
  103.           <p class="title">
  104.             <b>Figure¬†16.14.¬†
  105.         <span lang="en" xml:lang="en">Using example for Motion Blur filter</span>
  106.       </b>
  107.           </p>
  108.           <div class="figure-contents">
  109.             <div class="mediaobject">
  110.               <img src="../images/filters/examples/blur-taj-mblur-radial.jpg" alt="Using example for Motion Blur filter" />
  111.               <div class="caption">
  112.                 <p>Radial blur</p>
  113.               </div>
  114.             </div>
  115.             <div class="mediaobject">
  116.               <img src="../images/filters/examples/blur-taj-mblur-zoom.jpg" alt="Using example for Motion Blur filter" />
  117.               <div class="caption">
  118.                 <p>Zoom blur</p>
  119.               </div>
  120.             </div>
  121.           </div>
  122.         </div>
  123.         <br class="figure-break" />
  124.         <p>
  125.       You can find this filter in the image menu under
  126.       <span class="guimenu">Filte<span class="accel">r</span>s</span> ‚Üí <span class="guisubmenu"><span class="accel">B</span>lur</span> ‚Üí <span class="guimenuitem"><span class="accel">M</span>otion Blur</span>
  127.     </p>
  128.         <p>
  129.       The Motion Blur filter creates a movement blur. The filter is capable of
  130.       Linear, Radial, and Zoom movements. Each of these movements can be
  131.       further adjusted, with Length, or Angle settings available.
  132.     </p>
  133.       </div>
  134.       <div class="sect3" lang="en" xml:lang="en">
  135.         <div class="titlepage">
  136.           <div>
  137.             <div>
  138.               <h4 class="title"><a id="id2731820"></a>2.5.2.¬†
  139.       <span lang="en" xml:lang="en">Options</span>
  140.     </h4>
  141.             </div>
  142.           </div>
  143.         </div>
  144.         <div class="figure">
  145.           <a id="id2731831"></a>
  146.           <p class="title">
  147.             <b>Figure¬†16.15.¬†
  148.         <span lang="en" xml:lang="en">
  149.           ‚Äú<span class="quote">Motion Blur</span>‚Äù filter options
  150.         </span>
  151.       </b>
  152.           </p>
  153.           <div class="figure-contents">
  154.             <div class="mediaobject">
  155.               <img src="../images/filters/options-blur-mblur.png" alt="Motion Blur filter options" />
  156.             </div>
  157.           </div>
  158.         </div>
  159.         <br class="figure-break" />
  160.         <div class="variablelist">
  161.           <dl>
  162.             <dt>
  163.               <span class="term">Blur Type</span>
  164.             </dt>
  165.             <dd>
  166.               <div class="variablelist">
  167.                 <dl>
  168.                   <dt>
  169.                     <span class="term">Linear</span>
  170.                   </dt>
  171.                   <dd>
  172.                     <p>
  173.                   <span class="guilabel">Linear</span>
  174.                   motion is a blur that travels in a single direction,
  175.                   horizontally, for example. In this case, Length means as
  176.                   Radius in other filters:it represents the blur intensity.
  177.                   More Length will result in more blurring. Angle describes
  178.                   the actual angle of the movement. Thus, a setting of 90 will
  179.                   produce a vertical blur, and a setting of 0 will produce a
  180.                   horizontal blur.
  181.                 </p>
  182.                   </dd>
  183.                 </dl>
  184.               </div>
  185.               <div class="variablelist">
  186.                 <dl>
  187.                   <dt>
  188.                     <span class="term">Radial</span>
  189.                   </dt>
  190.                   <dd>
  191.                     <p>
  192.                   <span class="guilabel">Radial</span>
  193.                   motion blur creates a circular blur. The Length slider is
  194.                   not important with this type of blur. Angle on the other
  195.                   hand, is the primary setting that will affect the blur. More
  196.                   Angle will result in more blurring in a circular direction.
  197.                   The Radial motion blur is similar to the effect of a
  198.                   spinning object. The center of the spin in this case, is the
  199.                   center of the image.
  200.                 </p>
  201.                   </dd>
  202.                 </dl>
  203.               </div>
  204.               <div class="variablelist">
  205.                 <dl>
  206.                   <dt>
  207.                     <span class="term">Zoom</span>
  208.                   </dt>
  209.                   <dd>
  210.                     <p>
  211.                   <span class="guilabel">Zoom</span>
  212.                   blurring produces a blur that radiates out from the center
  213.                   of the image. The center of the image remains relatively
  214.                   calm, whilst the outer areas become blurred toward the
  215.                   center. This filter option produces a perceived forward
  216.                   movement, into the image. Length is the main setting here,
  217.                   and affects the amount of speed, as it were, toward the
  218.                   center of the image.
  219.                 </p>
  220.                   </dd>
  221.                 </dl>
  222.               </div>
  223.             </dd>
  224.             <dt>
  225.               <span class="term">Blur settings</span>
  226.             </dt>
  227.             <dd>
  228.               <div class="variablelist">
  229.                 <dl>
  230.                   <dt>
  231.                     <span class="term">Length</span>
  232.                   </dt>
  233.                   <dd>
  234.                     <p>
  235.                   <span class="guilabel">Length</span>: This slider controls the
  236.                   distance pixels are moved (0 - 256)
  237.                 </p>
  238.                   </dd>
  239.                   <dt>
  240.                     <span class="term">Angle</span>
  241.                   </dt>
  242.                   <dd>
  243.                     <p>
  244.                   <span class="guilabel">Angle</span>: (0 - 360) As seen above, Angle
  245.                   slider effect depends on Blur type.
  246.                 </p>
  247.                   </dd>
  248.                 </dl>
  249.               </div>
  250.             </dd>
  251.             <dt>
  252.               <span class="term">Blur Center</span>
  253.             </dt>
  254.             <dd>
  255.               <p>
  256.             With this option, you can set the starting point of movement.
  257.             Effect is different according to the Blur Type you have selected.
  258.             With Radial Type for instance, you set rotation center. With Zoom
  259.             Type, vanishing point. This option is greyed out with Linear type.
  260.           </p>
  261.               <div class="tip" style="margin-left: 0.5in; margin-right: 0.5in;">
  262.                 <table border="0" summary="Tip">
  263.                   <tr>
  264.                     <td rowspan="2" align="center" valign="top" width="25">
  265.                       <img alt="[Tip]" src="../images/tip.png" />
  266.                     </td>
  267.                     <th align="left">Tip</th>
  268.                   </tr>
  269.                   <tr>
  270.                     <td align="left" valign="top">
  271.                       <p>
  272.               You have to set the blur center coordinates. Unfortunately, you
  273.               can't do that by clicking on the image. But, by moving mouse
  274.               pointer on the image, you can see its coordinates in the lower
  275.               left corner of the image window. Only copy them out into the
  276.               input boxes.
  277.             </p>
  278.                     </td>
  279.                   </tr>
  280.                 </table>
  281.               </div>
  282.             </dd>
  283.           </dl>
  284.         </div>
  285.       </div>
  286.     </div>
  287.     <div class="navfooter">
  288.       <hr />
  289.       <table width="100%" summary="Navigation footer">
  290.         <tr>
  291.           <td width="40%" align="left"><a accesskey="p" href="plug-in-sel-gauss.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  292.           <td width="20%" align="center">
  293.             <a accesskey="u" href="filters-blur.html">
  294.               <img src="../images/up.png" alt="Up" />
  295.             </a>
  296.           </td>
  297.           <td width="40%" align="right">¬†<a accesskey="n" href="plug-in-pixelize.html"><img src="../images/next.png" alt="Next" /></a></td>
  298.         </tr>
  299.         <tr>
  300.           <td width="40%" align="left" valign="top"><a accesskey="p" href="plug-in-sel-gauss.html">2.4.¬†
  301.     <span lang="en" xml:lang="en">Selective Gaussian Blur</span>
  302.   </a>¬†</td>
  303.           <td width="20%" align="center">
  304.             <a accesskey="h" href="index.html">
  305.               <img src="../images/home.png" alt="Home" />
  306.             </a>
  307.           </td>
  308.           <td width="40%" align="right" valign="top">¬†<a accesskey="n" href="plug-in-pixelize.html">2.6.¬†
  309.     <span lang="en" xml:lang="en">Pixelise</span>
  310.   </a></td>
  311.         </tr>
  312.       </table>
  313.     </div>
  314.   </body>
  315. </html>
  316.