void cvPyrMeanShiftFiltering(CvArr* src, CvArr* dst, double sp, double sr, int max_level, CvTermCriteria termcrit) {
    void *fptr;

    fptr = dlsym(_Chcv_handle, "cvPyrMeanShiftFiltering_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return;
    }
    dlrunfun(fptr, NULL, cvPyrMeanShiftFiltering, src, dst, sp, sr, max_level, termcrit);
}
