/*-----------------------------------------------------------------------  File : cimgmatlab_cannyderiche.cpp  Description: Example for the CImg plugin: cimgmatlab.h  which allows to use CImg in order to develop matlab external  functions (mex functions).  User should be familiar with Matlab C/C++ mex function concepts,  as this file is by no way a mex programming tutorial.  This simple example implements a mex function that can be called   as   - v = cimgmatlab_cannyderiche(u,s)  - v = cimgmatlab_cannyderiche(u,sx,sy)  - v = cimgmatlab_cannyderiche(u,sx,sy,sz)  The corresponding m-file is cimgmatlab_cannyderiche.m      Copyright : Francois Lauze - http://www.itu.dk/people/francois  This software is governed by the Gnu General Public License  see http://www.gnu.org/copyleft/gpl.html   The plugin home page is at   http://www.itu.dk/people/francois/cimgmatlab.html  for the compilation: using the mex utility provided with matlab, just   remember to add the -I flags with paths to CImg.h and/or cimgmatlab.h.  The default lcc cannot be used, it is a C compiler and not a C++ one!--------------------------------------------------------------------------*/#include <mex.h>#define cimg_plugin "plugins/cimgmatlab.h"#include "../CImg.h"void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]){    if (nrhs < 2) mexErrMsgTxt("No enough input arguments.");    if (nrhs > 4) mexErrMsgTxt("Too many input arguments.");    	cimg_library::CImg<> u(prhs[0],true);    if (nrhs == 2) {        float s = (float)mxGetScalar(prhs[1]);        plhs[0] = u.get_blur(s).toMatlab();    } else if (nrhs == 3) {        float sx = (float)mxGetScalar(prhs[1]);        float sy = (float)mxGetScalar(prhs[2]);        plhs[0] = u.get_blur(sx,sy,0).toMatlab();    } else if (nrhs == 4) {        float sx = (float)mxGetScalar(prhs[1]);        float sy = (float)mxGetScalar(prhs[2]);        float sz = (float)mxGetScalar(prhs[3]);        plhs[0] = u.get_blur(sx,sy,sz).toMatlab();    }}