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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>FAQ : Frequently Asked Questions.</h1><table border="0" cellpadding="0" cellspacing="0"><tr><td></td></tr></table><h2><a class="anchor" name="ssf0">FAQ Summary</a></h2><ul><li><a href="#sf1">General information and availability</a><ul><li><a href="#ssf11">What is the CImg Library ?</a></li><li><a href="#ssf12">What platforms are supported ?</a></li><li><a href="#ssf13">How is CImg distributed ?</a></li><li><a href="#ssf14">What kind of people are concerned by CImg ?</a></li><li><a href="#ssf15">What are the specificities of the CeCILL license ?</a></li><li><a href="#ssf16">Who is behind CImg ?</a></li></ul></li></ul><p><ul><li><a href="#sf2">C++ related questions</a><ul><li><a href="#ssf21">What is the level of C++ knowledge needed to use CImg ?</a></li><li><a href="#ssf22">How to use CImg in my own C++ program ?</a></li></ul></li></ul><h2><a class="anchor" name="sf1">1. General information and availability</a></h2><h3><a class="anchor" name="ssf11">1.1. What is the CImg Library ?</a></h3>The CImg Library is an <em>open-source C++ toolkit for image processing</em>.<br><p>It mainly consists in a (big) single header file <a href="http://cimg.cvs.sourceforge.net/cimg/CImg/CImg.h?view=markup">CImg.h</a> providing a set of C++ classes and functions that can be used in your own sources, to load/save, process and display images. It's actually a very simple and pleasant toolkit for coding image processing stuffs in C++ : Just include the header file <em>CImg.h</em>, and you are ready to handle images in your C++ programs.<h3><a class="anchor" name="ssf12">1.2. What platforms are supported ?</a></h3>CImg is designed with <em>portability</em> in mind. It is regularly tested on different architectures and compilers, and should also work on any decent OS having a recent C++ compiler. Before each release, the CImg Library is compiled under these different configurations : <ul><li>PC Linux 32 bits, with g++. </li><li>PC Windows 32 bits, with Visual C++ 6.0. </li><li>PC Windows 32 bits, with Visual C++ Express Edition. </li><li>Sun SPARC Solaris 32 bits, with g++. </li><li>Mac PPC with OS X and g++.</li></ul>CImg has a minimal number of dependencies. In its minimal version, it can be compiled only with standard C++ headers. Anyway, it has interesting extension capabilities and can use external libraries to perform specific tasks more efficiently (Fourier Transform computation using FFTW for instance).<h3><a class="anchor" name="ssf13">1.3. How is CImg distributed ?</a></h3>The CImg Library is freely distributed as a complete .zip compressed package, hosted at the <a href="http://sourceforge.net/project/showfiles.php?group_id=96492">Sourceforge servers</a>.<br> The package is distributed under the <a href="http://www.cecill.info">CeCILL license</a>.<p>This package contains :<ul><li>The main library file <a href="http://cimg.cvs.sourceforge.net/cimg/CImg/CImg.h?view=markup">CImg.h</a> (C++ header file).</li><li>Several C++ source code showing <a href="http://cimg.cvs.sourceforge.net/cimg/CImg/examples/">examples of using CImg</a>.</li><li>A complete library documentation, in <a href="index.html">HTML</a> and <a href="../CImg_reference.pdf">PDF</a> formats.</li><li>Additional <a href="http://cimg.cvs.sourceforge.net/cimg/CImg/plugins/">library plug-ins</a> that can be used to extend library capabilities for specific uses.</li></ul><p>The CImg Library is a quite lightweight library which is easy to maintain (due to its particular structure), and thus has a fast rythm of release. A new version of the CImg package is released approximately every three months.<h3><a class="anchor" name="ssf14">1.4. What kind of people are concerned by CImg ?</a></h3>The CImg library is an <em>image processing</em> library, primarily intended for computer scientists or students working in the fields of image processing or computer vision, and knowing bases of C++. As the library is handy and really easy to use, it can be also used by any programmer needing occasional tools for dealing with images in C++, since there are no standard library yet for this purpose.<h3><a class="anchor" name="ssf15">1.5. What are the specificities of the CeCILL license ?</a></h3>The <a href="http://www.cecill.info">CeCILL license</a> governs the use of the CImg Library. This is an <em>open-source</em> license which gives you rights to access, use, modify and redistribute the source code, under certains conditions. There are two different variants of the CeCILL license used in CImg (namely <a href="http://www.cecill.info/licences/Licence_CeCILL_V2-en.html">CeCILL</a> and <a href="http://www.cecill.info/licences/Licence_CeCILL-C_V1-en.html">CeCILL-C</a>, all open-source), corresponding to different constraints on the source files :<ul><li>The <a href="http://www.cecill.info/licences/Licence_CeCILL-C_V1-en.html">CeCILL-C</a> license is the most permissive one, close to the <em>GNU LGPL license</em>, and <em>applies <b>only</b> on the main library file <a href="http://cimg.cvs.sourceforge.net/cimg/CImg/CImg.h?view=markup">CImg.h</a></em>. Basically, this license allows to use <a href="http://cimg.cvs.sourceforge.net/cimg/CImg/CImg.h?view=markup">CImg.h</a> in a closed-source product without forcing you to redistribute the entire software source code. Anyway, if one modifies the <a href="http://cimg.cvs.sourceforge.net/cimg/CImg/CImg.h?view=markup">CImg.h</a> source file, one has to redistribute the modified version of the file that must be governed by the same <a href="http://www.cecill.info/licences/Licence_CeCILL-C_V1-en.html">CeCILL-C</a> license.</li></ul><p><ul><li>The <a href="http://www.cecill.info/licences/Licence_CeCILL_V2-en.html">CeCILL</a> license applies to all other files (source examples, plug-ins and documentation) of the CImg Library package, and is close (even <em>compatible</em>) with the <em>GNU GPL license</em>. It <em>does not allow</em> the use of these files in closed-source products.</li></ul><p>You are invited to read the complete descriptions of the the <a href="http://www.cecill.info/licences/Licence_CeCILL-C_V1-en.html">CeCILL-C</a> and <a href="http://www.cecill.info/licences/Licence_CeCILL_V2-en.html">CeCILL</a> licenses before releasing a software based on the CImg Library.<h3><a class="anchor" name="ssf16">1.6. Who is behind CImg ?</a></h3>CImg has been started by <a href="http://www.greyc.ensicaen.fr/~dtschump/">David Tschumperl⌨️ 快捷键说明
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