CImg Library 1.3.1

CImg defines simple classes and methods aimed at manipulating generic images in your own C++ code: load/save various file formats, access pixel values, display, resize/rotate/mirror/filter, draw primitives (text, faces, curves, 3D objects), compute statistics, manage user interactions, and more.
Provided image classes can represent datasets up to 4-dimension wide (from 1D scalar signals to 3D hyperspectral volumes), with template pixel types. Image collections and sequences are also supported.
CImg is self-contained and thus highly portable. It fully works on different operating systems (Mac OS X, Unix, Windows, *BSD) with various C++ compilers (GNU g++, Intel icc, Visual C++, Borland bcc, etc).
NOTE: is licensed and distributed under the terms of the GNU General Public License (GPL) and GNU Library or Lesser General Public License (LGPL).

Enhancements
New features :
- Added configuration macro cimg_file_separator that takes value "/" or ""
- depending on which OS is running. This macro is used in load/save functions
- for better portability.
- New example file examples/gaussian_fit.cpp which demonstrates how to apply the
- Levenberg-Marquardt algorithm to fit a 3-parameter gaussian on a set of sample points.
- Added function CImg[{Display,List}]:empty() that returns a reference to an empty object
- (can be used to pass empty images as default values of function parameters).
- Added variant of the function CImg:draw_triangle() to draw riangle with linearly
- interpolated colors defined at each triangle vertex.
- Added a formula parser in CImg, so that many arithmetic operators can use it to
- evaluate expressions (given as a C-string).
- Added example file examples/plotter.cpp that plots a mathematical function on an interactive window.
- Added functions CImg:index() and CImg:map() that can index an image with a multi-spectral
- palette, or map a multi-spectral palette on an image.
Optimizations / Modifications :
- Added parameter bytes_per_pixel to force the use of 8 or 16 bits modes in functions
- CImg:save_magick(), CImg:save_pnm() and CImg:save_png(). Thanks to Julien Morat
- for pointing this out to me.
- Added parameter backward to CImg:displacement_field(), allowing to select between
- forward of backward estimation procedure.
- Parameters ru,rv in CImg:draw_ellipses() have been replaced by parameter angle.
- Function CImg[List]:get_split() is now able to split an image into bloc of given pixel size.
- Changed zbuffer parameter type to CImg in CImg:draw_* functions.
- Remove GREYCstoration specific code. The GREYCstoration algorithm is now a part of the GMIC framework.
- Note that the two functions CImg:blur_anisotropic() and CImg:blur_patch() are still here to
- smooth an image anisotropically (are the core algorithm of the former GREYCstoration).
Bug corrections :
- Corrected CImg:translate() : function parameters were the opposite of the real translation done.
- Modifications on CImg.h to be more compatible with VC++6.
- Corrected CImg:get_histogram().
- Corrected CImg:load_ascii().