Function Detect

jni/stasm/misc.cpp:800–838

}

vec_Rect Detect(                            // detect faces or facial features
    const Image&           img,             // in
    cv::CascadeClassifier& cascade,         // in
    const Rect*            searchrect,      // in: search in this region, can be NULL
    double                 scale_factor,    // in
    int                    min_neighbors,   // in
    int                    flags,           // in
    int                    minwidth_pixels) // in: reduces false positives
{
    CV_Assert(!cascade.empty());

    Rect searchrect1; searchrect1.width = 0;
    if (searchrect)
    {
        searchrect1 = *searchrect;
        ForceRectIntoImg(searchrect1, img);
        if (searchrect1.height == 0)
            searchrect1.width = 0;
    }
    Image roi(img,
              searchrect1.width? searchrect1: Rect(0, 0, img.cols, img.rows));

    // TODO If we don't allocate feats now we get a crash on mem release later.

    static const int MAX_NFACES_IN_IMG = int(1e4); // arb, but big
    vec_Rect feats(MAX_NFACES_IN_IMG);

    // Note: This call to detectMultiScale causes the Peak Working Set
    // to jump to 160 MBytes (multiface2.jpg) versus less than 50 MBytes
    // for the rest of Stasm (Feb 2013).

    cascade.detectMultiScale(roi, feats, scale_factor, min_neighbors, flags,
                             cvSize(minwidth_pixels, minwidth_pixels));

    if (!feats.empty() && searchrect1.width)
        DiscountSearchRegion(feats, searchrect1);

    return feats;
}

bool IsLeftFacing(EYAW eyaw) // true if eyaw is for a left facing face
{