void cvUndistortPoints(CvMat* src, CvMat* dst, CvMat* camera_matrix, CvMat* dist_coeffs, CvMat* R, CvMat* P) {
    void *fptr;

    fptr = dlsym(_Chcv_handle, "cvUndistortPoints_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return;
    }
    dlrunfun(fptr, NULL, cvUndistortPoints, src, dst, camera_matrix, dist_coeffs, R, P);
}
