void cvInitUndistortMap(CvMat* intrinsic_matrix, CvMat* distortion_coeffs, CvArr* mapx, CvArr* mapy) {
    void *fptr;

    fptr = dlsym(_Chcv_handle, "cvInitUndistortMap_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return;
    }
    dlrunfun(fptr, NULL, cvInitUndistortMap, intrinsic_matrix, distortion_coeffs, mapx, mapy);
}