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103 lines
3 KiB
C++
103 lines
3 KiB
C++
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/*-----------------------------------------------------------------------
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File : use_cimgmatlab.cpp
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Description: Example of use for the CImg plugin 'plugins/cimgmatlab.h'
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which allows to use CImg in order to develop matlab external
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functions (mex functions).
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User should be familiar with Matlab C/C++ mex function concepts,
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as this file is by no way a mex programming tutorial.
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This simple example implements a mex function that can be called
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as
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- v = cimgmatlab_cannyderiche(u,s)
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- v = cimgmatlab_cannyderiche(u,sx,sy)
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- v = cimgmatlab_cannyderiche(u,sx,sy,sz)
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The corresponding m-file is cimgmatlab_cannyderiche.m
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Copyright : Francois Lauze - http://www.itu.dk/people/francois
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This software is governed by the Gnu Lesser General Public License
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see http://www.gnu.org/copyleft/lgpl.html
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The plugin home page is at
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http://www.itu.dk/people/francois/cimgmatlab.html
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for the compilation: using the mex utility provided with matlab, just
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remember to add the -I flags with paths to CImg.h and/or cimgmatlab.h.
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The default lcc cannot be used, it is a C compiler and not a C++ one!
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--------------------------------------------------------------------------*/
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#include <mex.h>
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#define cimg_plugin "plugins/cimgmatlab.h"
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#include <CImg.h>
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void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
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if (nrhs < 2) mexErrMsgTxt("No enough input arguments.");
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if (nrhs > 4) mexErrMsgTxt("Too many input arguments.");
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cimg_library::CImg<> u(prhs[0],true);
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if (nrhs == 2) {
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const float s = (float)mxGetScalar(prhs[1]);
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plhs[0] = u.get_blur(s).toMatlab();
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} else if (nrhs == 3) {
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const float sx = (float)mxGetScalar(prhs[1]);
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const float sy = (float)mxGetScalar(prhs[2]);
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plhs[0] = u.get_blur(sx,sy,0).toMatlab();
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} else if (nrhs == 4) {
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const float sx = (float)mxGetScalar(prhs[1]);
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const float sy = (float)mxGetScalar(prhs[2]);
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const float sz = (float)mxGetScalar(prhs[3]);
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plhs[0] = u.get_blur(sx,sy,sz).toMatlab();
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}
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}
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/*------------------------------------------------------------------
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SPECIAL NOTE :
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-------------
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How to read a .mat file using plugin 'cimgmatlab.h' ?
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(contribution by Vo Duc Khanh/Denso IT Lab, Tokyo, Japan).
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#include <mex.h>
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#include <mat.h>
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#include <matrix.h>
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#define cimg_plugin "cimgmatlab.h"
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#include "CImg.h"
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#include <iostream>
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#include <string>
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.........
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using namespace cimg_library;
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using namespace std;
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// Load input images (125700 images) from training database 'BmpTrainingDb.mat'
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MATFile *pmat, *pmat_out;
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mxArray *pa, *pa_out;
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const char data_path[256] = ".\\BmpTrainingDb.mat\0";
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const char *var_name;
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pmat = matOpen(data_path, "r");
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if (pmat == NULL) {
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cout << "Error opening file " << data_path << endl;
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return (1);
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}
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pa = matGetNextVariable(pmat, &var_name);
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if (pa == NULL){
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cout << "Error reading in file " << data_path << endl;
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return (1);
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}
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CImg<unsigned char> train_db(pa,false);
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........
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-----------------------------------------------------------------------------*/
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