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<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>2.7.  Scissors</title> <link rel="stylesheet" href="gimp-help-plain.css" type="text/css" /> <link rel="stylesheet" href="gimp-help-screen.css" type="text/css" /> <link rel="stylesheet" href="gimp-help-custom.css" type="text/css" /> <link rel="alternate stylesheet" href="gimp22.css" type="text/css" title="gimp22" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="GNU Image Manipulation Program" /> <link rel="up" href="gimp-tools-selection.html" title="2. Selection Tools" /> <link rel="prev" href="gimp-tool-by-color-select.html" title="2.6.  Select By Color" /> <link rel="next" href="gimp-tool-foreground-select.html" title="2.8.  Foreground Select" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">2.7.  <span lang="en" xml:lang="en">Scissors</span> </th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="gimp-tool-by-color-select.html"><img src="../images/prev.png" alt="Prev" /></a> </td> <th width="60%" align="center">2. Selection Tools</th> <td width="20%" align="right"> <a accesskey="n" href="gimp-tool-foreground-select.html"><img src="../images/next.png" alt="Next" /></a></td> </tr> </table> <hr /> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="gimp-tool-iscissors"></a>2.7.  <span lang="en" xml:lang="en">Scissors</span> </h3> </div> <div> <div class="revhistory"> <table border="1" width="100%" summary="Revision history"> <tr> <th align="left" valign="top" colspan="3"> <b>Revision History</b> </th> </tr> <tr> <td align="left">Revision $Revision: 2429 $</td> <td align="left">2008-01-09</td> <td align="left">P.P</td> </tr> </table> </div> </div> </div> </div> <a id="id2625403" class="indexterm"></a> <a id="id2625416" class="indexterm"></a> <div class="figure"> <a id="id2625425"></a> <p class="title"> <b>Figure 13.20.  <span lang="en" xml:lang="en"> Intelligent Scissors tool icon in the Toolbox. </span> </b> </p> <div class="figure-contents"> <div class="mediaobject"> <img src="../images/toolbox/toolbox-scissor.png" alt="Intelligent Scissors tool icon in the Toolbox." /> </div> </div> </div> <br class="figure-break" /> <p> The Intelligent Scissors tool is an interesting piece of equipment: it has some features in common with the Lasso, some features in common with the Path tool, and some features all its own. It is useful when you are trying to select a region defined by strong color-changes at the edges. To use the Scissors, you click to create a set of "control nodes", also referred to as anchors or control points, at the edges of the region you are trying to select. The tool produces a continuous curve passing through these control nodes, following any high-contrast edges it can find. If you are lucky, the path that the tool finds will correspond to the contour you are trying to select. </p> <p> Each time you left-click with the mouse, you create a new control point, which is connected to the last control point by a curve that tries to follow edges in the image. To finish, click on the first point (the cursor changes to indicate when you are in the right spot). You can adjust the curve by dragging the control nodes, or by clicking to create new control nodes. When you are satisfied, click anywhere inside the curve to convert it into a selection. </p> <p> Unfortunately, there seem to be some problems with the edge-following logic for this tool, with the result that the selections it creates tend to be pretty crude in a lot of cases. A good way to clean them up is to switch to <a class="link" href="gimp-channel-dialog.html#gimp-qmask" title="2.2.4.  Quick Mask">QuickMask</a> mode, and use paint tools to paint in the problematic parts. On the whole, most people find the Path tool to be more useful than the Scissors, because, even though it does not have the intelligent edge-finding capability, the paths it produces persist until you delete them, and can be altered at any time. </p> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id2625508"></a>2.7.1.  <span lang="en" xml:lang="en">How to Activate</span> </h4> </div> </div> </div> <p> The Intelligent Scissors can be activated from an image menu as <span class="guimenu">Tools</span> → <span class="guisubmenu">Selection Tools</span> → <span class="guimenuitem">Intelligent Scissors</span>; from the Toolbox by clicking on the tool icon <span class="guiicon"> <span class="inlinemediaobject"><img src="../images/toolbox/stock-tool-iscissors-22.png" /></span> </span> ; or from the keyboard using the shortcut <span class="keycap"><strong>i</strong></span>. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id2625574"></a>2.7.2.  <span lang="en" xml:lang="en">Key modifiers (Defaults)</span> </h4> </div> </div> </div> <p> The Scissor tool does not have any special key modifiers, only the ones that affect all selection tools in the same way. See <a class="xref" href="gimp-tools-selection.html#gimp-tool-select" title="2.1.  Common Features">Section 2.1, “ <span lang="en" xml:lang="en">Common Features</span> ”</a> for help with these. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id2625601"></a>2.7.3.  <span lang="en" xml:lang="en">Tool handling</span> </h4> </div> </div> </div> <div class="figure"> <a id="id2625613"></a> <p class="title"> <b>Figure 13.21.  <span lang="en" xml:lang="en">Using Intelligent Scissors.</span> </b> </p> <div class="figure-contents"> <div class="mediaobject"> <img src="../images/toolbox/iscissors-selection.png" alt="Using Intelligent Scissors." /> </div> </div> </div> <br class="figure-break" /> <p> As said above when you click with this tool you drop points. The selection boundary is driven by these control points. During creation you can move each one by clicking and dragging, except the first and the last one. The selection is closed when you are clicking the last point over the first one. When the selection is closed the pointer shape changes according to its position: inside <span class="guiicon"> <span class="inlinemediaobject"><img src="../images/toolbox/cissors-mouse.png" /></span> </span> , on the boundary <span class="guiicon"> <span class="inlinemediaobject"><img src="../images/toolbox/cissors-plus.png" /></span> </span> and outside <span class="guiicon"> <span class="inlinemediaobject"><img src="../images/toolbox/cissors-bad.png" /></span> </span> . You can adjust the selection creating new points by clicking on the boundary or by moving each control points (merged first and last point). The selection is validated when you click inside. </p> <p> You have to notice that you can get only one selection; if you create a second selection, the first one is erased when you validate the second one. </p> <div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;"> <table border="0" summary="Warning"> <tr> <td rowspan="2" align="center" valign="top" width="25"> <img alt="[Warning]" src="../images/warning.png" /> </td> <th align="left">Warning</th> </tr> <tr> <td align="left" valign="top"> <p> Be sure not to click inside the curve until you are completely done adjusting it. Once you have converted it into a selection, undoing takes you back to zero, and you will have to to start constructing the curve again from scratch if you need to change it. Also be sure not to switch to a different tool, or again all of your carefully created control nodes will be lost. (But you still can transform your selection into a path and work it with the Path tool.) </p> </td> </tr> </table> </div> <p> To move the selection, see <a class="link" href="gimp-using-selections.html#gimp-using-selections-moving" title="2.1.  Moving a Selection">Moving selections</a>. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="id2625751"></a>2.7.4.  <span lang="en" xml:lang="en">Options</span> </h4> </div> </div> </div> <div class="figure"> <a id="id2625762"></a> <p class="title"> <b>Figure 13.22.  <span lang="en" xml:lang="en">Tool Options for the Intelligent Scissors</span> </b> </p> <div class="figure-contents"> <div class="mediaobject"> <img src="../images/toolbox/tool-options-scissor.png" alt="Tool Options for the Intelligent Scissors" /> </div> </div> </div> <br class="figure-break" /> <p> You can get the tool option display by double-clicking on the <span class="guiicon"> <span class="inlinemediaobject"><img src="../images/toolbox/stock-tool-iscissors-22.png" /></span> </span> icon within the Tool box. </p> <div class="variablelist"> <dl> <dt> <span class="term"> Modes; Antialias; Feather edges </span> </dt> <dd> <div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"> <table border="0" summary="Note"> <tr> <td rowspan="2" align="center" valign="top" width="25"> <img alt="[Note]" src="../images/note.png" /> </td> <th align="left">Note</th> </tr> <tr> <td align="left" valign="top"> <p> See <a class="link" href="gimp-tools-selection.html#gimp-tool-select" title="2.1.  Common Features">Selection Tools</a> for help with options that are common to all these tools. Only options that are specific to this tool are explained here. </p> </td> </tr> </table> </div> </dd> </dl> </div> <div class="variablelist"> <dl> <dt> <span class="term">Interactive boundary</span> </dt> <dd> <p> If this option is enabled, dragging a control node during placement will indicate the path that will be taken by the selection boundary. If it is not enabled, the node will be shown connected to the previous node by a straight line while you are dragging it around, and you won't see the resulting path until you release the pointer button. On slow systems, if your control nodes are far apart, this may give a bit of a speed-up. </p> </dd> </dl> </div> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="gimp-tool-by-color-select.html"><img src="../images/prev.png" alt="Prev" /></a> </td> <td width="20%" align="center"> <a accesskey="u" href="gimp-tools-selection.html"> <img src="../images/up.png" alt="Up" /> </a> </td> <td width="40%" align="right"> <a accesskey="n" href="gimp-tool-foreground-select.html"><img src="../images/next.png" alt="Next" /></a></td> </tr> <tr> <td width="40%" align="left" valign="top"><a accesskey="p" href="gimp-tool-by-color-select.html">2.6.  <span lang="en" xml:lang="en">Select By Color</span> </a> </td> <td width="20%" align="center"> <a accesskey="h" href="index.html"> <img src="../images/home.png" alt="Home" /> </a> </td> <td width="40%" align="right" valign="top"> <a accesskey="n" href="gimp-tool-foreground-select.html">2.8.  <span lang="en" xml:lang="en">Foreground Select</span> </a></td> </tr> </table> </div> </body> </html> 
