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<!DOCTYPE html PUBLIC "-//w3c//dtd html 4.0 transitional//en"><html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <title>The CImg Library - C++ Template Image Processing Library</title> <meta content="David Tschumperle" name="author"> <link rel="shortcut icon" type="image/x-icon" href="http://cimg.sourceforge.net/favicon.ico" /> <link rel="icon" type="image/png" href="favicon.png" /> <style type="text/css" media=screen> <!-- a:active{text-decoration:none; color:#303090} a:link{text-decoration:none; color:#303090} a:visited{text-decoration:none; color:#303090} a:hover{text-decoration:none; color:#4E9F71} --> </style> </head> <body bgcolor="#ffffff" fgcolor="#000000" alink="#ff0000" link="#0000ee" vlink="#551a8b"> <table align="center" border="0" cellpadding="0" cellspacing="0" width="1024"> <tbody> <tr> <td> <hr noshade="noshade" size="1" width="100%"> <center> <a href="http://cimg.sourceforge.net"><img src="../img/CImgLogo2.jpg" border="0"><img src="../img/CImgLogo.jpg" border="0"></a><br> <table style="width: 100%; text-align: left;" border="0" cellpadding="2" cellspacing="2"> <tbody> <tr> <td style="vertical-align: top; text-align: right;"><font face="Arial,Helvetica"><big> <b>C++ Template Image Processing Library.</b></big></font></td> <td style="vertical-align: top; text-align: right;"> <a href="http://www.cnrs.fr/"><img src="../img/logoCNRS.gif" border="0"></a> <a href="http://www.greyc.ensicaen.fr/EquipeImage/"><img src="../img/logoGREYC.gif" border="0"></a> <a href="http://www-sop.inria.fr"><img src="../img/logoINRIA.gif" border="0"></a> </td> </tr> </tbody> </table> </center> <hr noshade="noshade" size="1" width="100%"> <center> <table style="width: 100%; text-align: left; margin-left: auto; margin-right: auto; background-color: rgb(238, 238, 255);" border="0" cellpadding="3" cellspacing="0"> <tbody> <tr> <td style="text-align: center; vertical-align: top;"> <font face="Arial,Helvetica" color="#FFFFFF" size="-1"> <b>[</b> <a target="_parent" href="../index.shtml">Introduction</a> <b>]</b>-<b>[</b> <a target="_parent" href="../news.shtml">News</a> <b>]</b>-<b>[</b> <a target="_parent" href="../download.shtml">Download</a> <b>]</b>-<b>[</b> <a target="_parent" href="../screenshots.shtml">Screenshots</a> <b>]</b>-<b>[</b> <a target="_parent" href="../reference/group__cimg__faq.html">FAQ</a> <b>]</b>-<b>[</b> <a target="_parent" href="../reference/group__cimg__tutorial.html">Tutorial</a> <b>]</b>-<b>[</b> <a target="_parent" href="../links.shtml">Links</a> <b>]</b>-<b>[</b> <a target="_parent" href="http://sourceforge.net/forum/forum.php?forum_id=334630">Forums-Eng</a> <b>]</b>-<b>[</b> <a target="_parent" href="http://sourceforge.net/forum/forum.php?forum_id=421080">Forums-Fr</a> <b>]</b>-<b>[</b> <a target="_parent" href="../reference/index.html">Reference</a> <b>]</b>-<b>[</b> <a target="_parent" href="http://sourceforge.net/projects/cimg/">SourceForge Repository</a> <b>]</b> </font></td> </tr> </tbody> </table> </center> <hr noshade="noshade" size="1" width="100%"> <noscript> </noscript> </td> </tr> </tbody> </table> </body></html><!-- Generated by Doxygen 1.5.1 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="modules.html"><span>Modules</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> </ul></div><h1>Using Drawing Functions.</h1><table border="0" cellpadding="0" cellspacing="0"><tr><td></td></tr></table><h2><a class="anchor" name="s5">Using Drawing Functions.</a></h2>This section tells more about drawing features in CImg images. Drawing functions list can be found in <a href="structCImg.html">the CImg functions list</a> (section <b>Drawing</b> Functions), and are all defined on a common basis. Here are the important points to understand before using drawing functions :<p><ul><li>Drawing is performed on the instance image. Drawing functions parameters are defined as <em>const</em> variables and return a reference to the current instance <code>(*this)</code>, so that drawing functions can be pipelined (see examples below). Drawing is usually done in 2D color images but can be performed in 3D images with any vector-valued dimension, and with any possible pixel type.</li></ul><p><ul><li>A color parameter is always needed to draw features in an image. The color must be defined as a C-style array whose dimension is at least </li></ul><!DOCTYPE html PUBLIC "-//w3c//dtd html 4.0 transitional//en"><html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <title>The CImg Library - C++ Template Image Processing Library</title> <meta content="David Tschumperle" name="author"> <link rel="shortcut icon" type="image/x-icon" href="http://cimg.sourceforge.net/favicon.ico" /> <link rel="icon" type="image/png" href="favicon.png" /> <link href="doxygen.css" rel="stylesheet" type="text/css"> </head> <body bgcolor="#ffffff" fgcolor="#000000" alink="#ff0000" link="#0000ee" vlink="#551a8b"> <hr noshade="noshade" size="1" width="100%"> <a href="http://sourceforge.net"> <img src="http://sourceforge.net/sflogo.php?group_id=96492&type=3" border="0" height="37" width="125"></a><!-- Start of StatCounter Code --><script type="text/javascript" language="javascript"><!-- var sc_project=895001; var sc_invisible=1; var sc_partition=7; var sc_security="5ea85181"; //--></script><script type="text/javascript" language="javascript" src="http://www.statcounter.com/counter/counter.js"></script><noscript><a href="http://www.statcounter.com/" target="_blank"><img src="http://c8.statcounter.com/counter.php?sc_project=895001&java=0&security=5ea85181&invisible=1" alt="counter stats" border="0"></a> </noscript><!-- End of StatCounter Code --> </body></html>⌨️ 快捷键说明
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