The CImg Library 1.5.5

The CImg Library is an open source, C++ toolkit for image processing, designed with these properties in mind : CImg defines classes and methods to manage images in your own C++ code. You can use it to load/save various file formats, access pixel values, display/transform/filter images, draw primitives (text, faces, curves, 3d objects, ...), compute statistics, manage user interactions on images, and so on... CImg defines a single image class which can represent datasets having up to 4-dimensions (from 1d scalar signals to 3d hyperspectral volumetric images), with template pixel types (bool,char,int,float,...).
It also handles image collections and sequences. CImg is self-contained and thus highly portable. It fully works on different operating systems (Unix,Windows,MacOS X,*BSD,...) and is compatible with various C++ compilers (Visual C++,g++,icc,...). CImg is lightweight. It is made of a single header file CImg.h that must be included in your C++ source. It defines only four different classes, encapsulated in a namespace. It can be compiled using a minimal set of standard C++ and system libraries.
No need for exotic or complex dependencies. Although not mandatory, CImg can use functionalities of external tools/libraries such as ImageMagick, GraphicsMagick, XMedCon, FFMPEG,libpng, libjpeg, libtiff, Magick++, OpenCV, Lapack, Board, OpenEXR or FFTW3. Moreover, a simple plug-in mechanism allows any user to directly enhance the library capabilities according to his needs. CImg is a free, open-source library distributed under the CeCILL-C (close to the GNU LGPL) or CeCILL (compatible with the GNU GPL) licenses. It can be used in commercial applications.   CImg stands for Cool Image : It is easy to use, efficient and is intended to be a very pleasant toolbox to design image processing algorithms in C++. Due to its generic conception, it covers a wide range of image processing applications.