Function MouthVerticalShift

jni/stasm/eyedet.cpp:545–569

// center of the mouth determined by manual landmarking).  Correct that here.

static int MouthVerticalShift(
    const int       ileft_best,   // in
    const int       iright_best,  // in
    const int       imouth_best,  // in
    const vec_Rect& leyes,        // in
    const vec_Rect& reyes,        // in
    const vec_Rect& mouths)       // in
{
    double shift = 0; // assume no shift
    if (ileft_best != -1 && iright_best != -1) // got both eyes?
    {
        CV_Assert(imouth_best != -1);
        // get eye mouth distance: first get center of both eyes
        const double xleft  = leyes[ileft_best].x  + leyes[ileft_best].width   / 2;
        const double yleft  = leyes[ileft_best].y  + leyes[ileft_best].height  / 2;
        const double xright = reyes[iright_best].x + reyes[iright_best].width  / 2;
        const double yright = reyes[iright_best].y + reyes[iright_best].height / 2;
        const double eyemouth =
            PointDist((xleft + xright) / 2,(yleft + yright) / 2,
                      mouths[imouth_best].x, mouths[imouth_best].y);
        static const double MOUTH_VERT_ADJUST = -0.050; // neg to shift up
        shift = MOUTH_VERT_ADJUST * eyemouth;
    }
    return cvRound(shift);
}

static bool MouthOnNose(   // true if mouth is probably a mouth false detect on the nostrils
    const Rect& mouth,     // in: left eyes found by eye detector