void cvInitUndistortRectifyMap(CvMat* camera_matrix, CvMat* dist_coeffs, CvMat *R, CvMat* new_camera_matrix, CvArr* mapx, CvArr* mapy) {
    void *fptr;

    fptr = dlsym(_Chcv_handle, "cvInitUndistortRectifyMap_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return;
    }
    dlrunfun(fptr, NULL, cvInitUndistortRectifyMap, camera_matrix, dist_coeffs, R, new_camera_matrix, mapx, mapy);
}
