I want to read some image to run a C++ MEX function to process this image. The image is originally stored as a Matlab 3D matrix, and then converted to a 2D matrix and each slice of the image is stored as a 1D vector. Here is some example codes below.
The MEX function:
include "mex.h"
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
unsigned int** ubuff;
size_t col_ubuff = mxGetN(prhs[0]);
size_t row_ubuff = mxGetM(prhs[0]);
ubuff = (unsigned int **)mxCalloc(col_ubuff, row_ubuff);
for(int x = 0; x < col_ubuff; x++) {
ubuff[x] = (unsigned int *) mxCalloc(row_ubuff, sizeof(unsigned int));
}
for (int col=0; col < col_ubuff; col++) {
for (int row=0; row < row_ubuff; row++) {
ubuff[col][row] = mxGetPr(prhs[0])[row+col*row_ubuff];
}
}
unsigned int the_pixel_i_want = ubuff[16][2*32 + 2];
printf ("Debug: %d\n\n", the_pixel_i_want);
return;
}
2. The program can be compiled; however, the results of running the program is strange; for example, I have some test codes and test image with all pixels to be 188,
volImage = 188.*ones(32,32,32);
volImageVec = reshape(volImage, 32*32, 32)';
volImageVec = uint32(volImageVec);
TestInputImage(volImageVec');
But the output sometimes be 188 and sometimes be 0. Is there a memory leak somewhere in my code? Thanks very much for your help.
