int cvStereoRectifyUncalibrated(CvMat* points1, CvMat* points2, CvMat* F, CvSize img_size, CvMat* H1, CvMat* H2, double threshold) {
    void *fptr;
    int retval;

    fptr = dlsym(_Chcv_handle, "cvStereoRectifyUncalibrated_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return -1;
    }
    dlrunfun(fptr, &retval, cvStereoRectifyUncalibrated, points1, points2, F, img_size, H1, H2, threshold);
    return retval;
}
