关于Halcon::threshold 用时

CWatch watch;
    for (int i = 0; i < 100; i++)
    {
        Halcon::threshold(imgCoatCheck, &m_regions.m_regionCoatLightNG, dMedialCoatCheckGray + iNGDiffGray, 255);
        Halcon::threshold(imgCoatCheck, &m_regions.m_regionCoatDarkNG, 0, dMedialCoatCheckGray - iNGDiffGray);
    }
    watch.Watch();
    for (int i = 0; i < 100; i++)
    {
        Hobject region;
        Halcon::HTuple tMin, tMax;
        tMin.Append(0.0).Append(dMedialCoatCheckGray + iNGDiffGray);
        tMax.Append(dMedialCoatCheckGray - iNGDiffGray).Append(255.0);
        Halcon::threshold(imgCoatCheck, ®ion, tMin, tMax);
    }
    watch.Watch();