Function CreatePyr

jni/stasm/asm.cpp:207–220

}

static void CreatePyr(    // create image pyramid
    vector<Image>& pyr,   // out: the pyramid, pyr[0] is full size image
    const Image&   img,   // in:  full size image
    int            nlevs) // in
{
    CV_Assert(nlevs >= 1 && nlevs < 10); // 10 is arb
    pyr.resize(nlevs);
    pyr[0] = img;        // pyramid level 0 is full size image
    for (int ilev = 1; ilev < nlevs; ilev++)
    {
        const double scale = GetPyrScale(ilev);
        cv::resize(img, pyr[ilev], cv::Size(), scale, scale, cv::INTER_LINEAR);
    }
}

static double GetPrescale(   // factor to scale face to standard size prior to search
    const Shape& startshape) // in: startshape roughly positioned on face