const CvMat* cvKalmanCorrect(CvKalman* kalman, CvMat* measurement) {
    void *fptr;
    const CvMat*retval;

    fptr = dlsym(_Chcv_handle, "cvKalmanCorrect_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return NULL;
    }
    dlrunfun(fptr, &retval, cvKalmanCorrect, kalman, measurement);
    return retval;
}
