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  1. <?xml version="1.0" encoding="UTF-8" standalone="no"?>
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  4.   <head>
  5.     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
  6.     <title>5.5.¬† Sample Points Dialog</title>
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  12.     <link rel="start" href="index.html" title="GNU Image Manipulation Program" />
  13.     <link rel="up" href="gimp-dialogs-misc.html" title="5.¬† Misc. Dialogs" />
  14.     <link rel="prev" href="gimp-export-dialog.html" title="5.4.¬† Export File" />
  15.     <link rel="next" href="gimp-pointer-info-dialog.html" title="5.6.¬† Pointer Dialog" />
  16.   </head>
  17.   <body>
  18.     <div class="navheader">
  19.       <table width="100%" summary="Navigation header">
  20.         <tr>
  21.           <th colspan="3" align="center">5.5.¬†
  22.     <span lang="en" xml:lang="en">Sample Points Dialog</span>
  23.   </th>
  24.         </tr>
  25.         <tr>
  26.           <td width="20%" align="left"><a accesskey="p" href="gimp-export-dialog.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  27.           <th width="60%" align="center">5.¬†
  28.     <span lang="en" xml:lang="en">Misc. Dialogs</span>
  29.   </th>
  30.           <td width="20%" align="right">¬†<a accesskey="n" href="gimp-pointer-info-dialog.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="gimp-sample-point-dialog"></a>5.5.¬†
  40.     <span lang="en" xml:lang="en">Sample Points Dialog</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: 2439 $</td>
  53.                   <td align="left">2008-03-01</td>
  54.                   <td align="left">ude</td>
  55.                 </tr>
  56.               </table>
  57.             </div>
  58.           </div>
  59.         </div>
  60.       </div>
  61.       <a id="id2672685" class="indexterm"></a>
  62.       <a id="id2672700" class="indexterm"></a>
  63.       <p>
  64.     While the <a class="link" href="gimp-tool-color-picker.html" title="6.2.¬† Color Picker">Color Picker</a>
  65.     can display color information about one pixel, the
  66.     ‚Äú<span class="quote">Sample¬†Points</span>‚Äù dialog can display the data of four pixels of
  67.     the active layer or the image, at the same time. Another important
  68.     difference is that the values of these points are changed in real time
  69.     as you are working on the image.
  70.   </p>
  71.       <div class="sect3" lang="en" xml:lang="en">
  72.         <div class="titlepage">
  73.           <div>
  74.             <div>
  75.               <h4 class="title"><a id="id2672734"></a>5.5.1.¬†
  76.       <span lang="en" xml:lang="en">Activate Dialog</span>
  77.     </h4>
  78.             </div>
  79.           </div>
  80.         </div>
  81.         <p>
  82.       The dialog ‚Äú<span class="quote">Sample points</span>‚Äù
  83.       is dockable. Read <a class="xref" href="gimp-concepts-docks.html" title="2.3.¬† Dialogs and Docking">Section¬†2.3, ‚Äú
  84.     <span lang="en" xml:lang="en">Dialogs and Docking</span>
  85.   ‚Äù</a> to learn more
  86.       about the concept of dockability. You can access to this dialog in
  87.       different ways:
  88.     </p>
  89.         <div class="itemizedlist">
  90.           <ul type="disc">
  91.             <li>
  92.               <p>
  93.           From the toolbox-menu and the image Menu bar:
  94.           <span class="guimenu">File</span> ‚Üí <span class="guisubmenu">Dialogs</span> ‚Üí <span class="guimenuitem">Sample Points</span>
  95.         </p>
  96.             </li>
  97.             <li>
  98.               <p>
  99.           From the image Menu-bar:
  100.           <span class="guimenu">Dialogs</span> ‚Üí <span class="guimenuitem">Sample Points</span>
  101.         </p>
  102.             </li>
  103.           </ul>
  104.         </div>
  105.       </div>
  106.       <div class="sect3" lang="en" xml:lang="en">
  107.         <div class="titlepage">
  108.           <div>
  109.             <div>
  110.               <h4 class="title"><a id="id2672826"></a>5.5.2.¬†
  111.       <span lang="en" xml:lang="en">Using sample points</span>
  112.     </h4>
  113.             </div>
  114.           </div>
  115.         </div>
  116.         <p>
  117.       To create a sample point, Ctrl-click on one of the two measure rules
  118.       of the image window and drag the mouse pointer. Two perpendicular
  119.       guides appear. The sample point is where both guides intersect. You
  120.       can see its coordinates in the lower left corner and the information
  121.       bar of the image window. Release the mouse button.
  122.     </p>
  123.         <p>
  124.       By default, this sample point comes with a round mark and an order
  125.       number. You can cancel these marks by unchecking the <span class="guilabel">Show
  126.       Sample Points</span> option in the <span class="guilabel">View</span>
  127.       menu.
  128.     </p>
  129.         <p>
  130.       The ‚Äú<span class="quote">Sample Points</span>‚Äù dialog should automatically open
  131.       when you create a sample point. This is not the case; you have to
  132.       open it manually.
  133.     </p>
  134.         <p>
  135.       You can delete a sample point, as you do with guides, by
  136.       click-and-dragging it up to a rule. Order numbers are automatically
  137.       re-arranged in the dialog window; the most recent are moved one rank
  138.       up.
  139.     </p>
  140.         <p>
  141.       By default, sampling is performed on all layers. If you want to
  142.       sample on the active layer only, uncheck the <span class="guilabel">Sample
  143.       merged</span> option in the tab menu:
  144.     </p>
  145.         <div class="figure">
  146.           <a id="id2672905"></a>
  147.           <p class="title">
  148.             <b>Figure¬†14.73.¬†
  149.         <span lang="en" xml:lang="en">The ‚Äú<span class="quote">Sample Point</span>‚Äù menu</span>
  150.       </b>
  151.           </p>
  152.           <div class="figure-contents">
  153.             <div class="mediaobject">
  154.               <img src="../images/dialogs/sample-points-menu.png" alt="The Sample Point menu" />
  155.             </div>
  156.           </div>
  157.         </div>
  158.         <br class="figure-break" />
  159.       </div>
  160.       <div class="sect3" lang="en" xml:lang="en">
  161.         <div class="titlepage">
  162.           <div>
  163.             <div>
  164.               <h4 class="title"><a id="id2672941"></a>5.5.3.¬†
  165.       <span lang="en" xml:lang="en">
  166.         ‚Äú<span class="quote">Sample Points</span>‚Äù dialog description
  167.       </span>
  168.     </h4>
  169.             </div>
  170.           </div>
  171.         </div>
  172.         <div class="figure">
  173.           <a id="id2672956"></a>
  174.           <p class="title">
  175.             <b>Figure¬†14.74.¬†
  176.         <span lang="en" xml:lang="en">Sample points dialog</span>
  177.       </b>
  178.           </p>
  179.           <div class="figure-contents">
  180.             <div class="mediaobject">
  181.               <img src="../images/dialogs/sample-points-dialog.png" alt="Sample points dialog" />
  182.             </div>
  183.           </div>
  184.         </div>
  185.         <br class="figure-break" />
  186.         <p>
  187.       The informations of four sample points are displayed in this window.
  188.       You can create more, which will be existing and not shown. To show
  189.       them, you have to delete displayed points.
  190.     </p>
  191.         <p>
  192.       The color of the sampled point is displayed in a swatch box.
  193.     </p>
  194.         <p>
  195.       In the drop-down list, you can choose between:
  196.     </p>
  197.         <div class="variablelist">
  198.           <dl>
  199.             <dt>
  200.               <span class="term">
  201.           <span lang="en" xml:lang="en">Pixel</span>
  202.         </span>
  203.             </dt>
  204.             <dd>
  205.               <p>
  206.             This choice displays the <span class="emphasis"><em>Red</em></span>,
  207.             <span class="emphasis"><em>Green</em></span>, <span class="emphasis"><em>Blue</em></span> and
  208.             <span class="emphasis"><em>Alpha</em></span> values of the pixel, as numbers between
  209.             0 and 255.
  210.           </p>
  211.             </dd>
  212.             <dt>
  213.               <span class="term">
  214.           <span lang="en" xml:lang="en">RGB</span>
  215.         </span>
  216.             </dt>
  217.             <dd>
  218.               <p>
  219.             This choice displays the <span class="emphasis"><em>Red</em></span>,
  220.             <span class="emphasis"><em>Green</em></span>, <span class="emphasis"><em>Blue</em></span> and
  221.             <span class="emphasis"><em>Alpha</em></span> values of the pixel, as percentages. It
  222.             also shows the hexadecimal value of the pixel's color.
  223.           </p>
  224.             </dd>
  225.             <dt>
  226.               <span class="term">
  227.           <span lang="en" xml:lang="en">HSV</span>
  228.         </span>
  229.             </dt>
  230.             <dd>
  231.               <p>
  232.             This choice displays the <span class="emphasis"><em>Hue</em></span>, in degrees, as
  233.             well as the <span class="emphasis"><em>Saturation</em></span>,
  234.             <span class="emphasis"><em>Value</em></span> and <span class="emphasis"><em>Alpha</em></span> of the
  235.             pixel, as percentages.
  236.           </p>
  237.             </dd>
  238.             <dt>
  239.               <span class="term">
  240.           <span lang="en" xml:lang="en">CMYK</span>
  241.         </span>
  242.             </dt>
  243.             <dd>
  244.               <p>
  245.             This choice displays the <span class="emphasis"><em>Cyan</em></span>,
  246.             <span class="emphasis"><em>Magenta</em></span>, <span class="emphasis"><em>Yellow</em></span>,
  247.             <span class="emphasis"><em>Black</em></span> and <span class="emphasis"><em>Alpha</em></span> values
  248.             of the pixel, as percentages.
  249.           </p>
  250.             </dd>
  251.           </dl>
  252.         </div>
  253.         <p>
  254.       Data are supplied for every channel in the chosen color model. The
  255.       Alpha is present only if the image holds an Alpha channel.
  256.     </p>
  257.       </div>
  258.     </div>
  259.     <div class="navfooter">
  260.       <hr />
  261.       <table width="100%" summary="Navigation footer">
  262.         <tr>
  263.           <td width="40%" align="left"><a accesskey="p" href="gimp-export-dialog.html"><img src="../images/prev.png" alt="Prev" /></a>¬†</td>
  264.           <td width="20%" align="center">
  265.             <a accesskey="u" href="gimp-dialogs-misc.html">
  266.               <img src="../images/up.png" alt="Up" />
  267.             </a>
  268.           </td>
  269.           <td width="40%" align="right">¬†<a accesskey="n" href="gimp-pointer-info-dialog.html"><img src="../images/next.png" alt="Next" /></a></td>
  270.         </tr>
  271.         <tr>
  272.           <td width="40%" align="left" valign="top"><a accesskey="p" href="gimp-export-dialog.html">5.4.¬†
  273.     <span lang="en" xml:lang="en">Export File</span>
  274.   </a>¬†</td>
  275.           <td width="20%" align="center">
  276.             <a accesskey="h" href="index.html">
  277.               <img src="../images/home.png" alt="Home" />
  278.             </a>
  279.           </td>
  280.           <td width="40%" align="right" valign="top">¬†<a accesskey="n" href="gimp-pointer-info-dialog.html">5.6.¬†
  281.     <span lang="en" xml:lang="en">Pointer Dialog</span>
  282.   </a></td>
  283.         </tr>
  284.       </table>
  285.     </div>
  286.   </body>
  287. </html>
  288.