Function PinnedStartShapeAndRoi

jni/stasm/pinstart.cpp:251–292

// points.  But the routine also works if any two or more points are pinned.

void PinnedStartShapeAndRoi(   // use the pinned landmarks to init the start shape
    Shape&         startshape, // out: the start shape (in ROI frame)
    Image&         face_roi,   // out: ROI around face, possibly rotated upright
    DetectorParameter& detpar_roi, // out: detpar wrt to face_roi
    DetectorParameter& detpar,     // out: detpar wrt to img
    Shape&         pinned_roi, // out: pinned arg translated to ROI frame
    const Image&   img,        // in: the image (grayscale)
    const vec_Mod& mods,       // in: a vector of models, one for each yaw range
    const Shape&   pinned)     // in: manually pinned landmarks
{
    double rot, yaw;
    EstRotAndYawFrom5PointShape(rot, yaw,
                                Shape5(pinned, mods[0]->MeanShape_()));
    const EYAW eyaw = DegreesAsEyaw(yaw, NSIZE(mods));
    const int imod = EyawAsModIndex(eyaw, mods); // select ASM model based on yaw
    if (trace_g)
        lprintf("%-6.6s yaw %3.0f rot %3.0f ", EyawAsString(eyaw), yaw, rot);
    pinned_roi = pinned;    // use pinned_roi as a temp shape we can change
    Image workimg(img);     // possibly flipped image
    if (IsLeftFacing(eyaw)) // left facing? (our models are for right facing faces)
    {
        pinned_roi = FlipShape(pinned_roi, workimg.cols);
        FlipImgInPlace(workimg);
    }
    const Mod* mod = mods[ABS(imod)];
    startshape = PinMeanShape(pinned_roi, mod->MeanShape_());
    startshape = mod->ConformShapeToMod_Pinned_(startshape, pinned_roi);
    detpar = PseudoDetParFromStartShape(startshape, rot, yaw, NSIZE(mods));
    if (IsLeftFacing(eyaw))
        detpar.rot *= -1;
    FaceRoiAndDetectorParameter(face_roi, detpar_roi, workimg, detpar, false);
    startshape = ImgShapeToRoiFrame(startshape, detpar_roi, detpar);
    pinned_roi = ImgShapeToRoiFrame(pinned_roi, detpar_roi, detpar);
    // following line not strictly necessary because don't actually need eyes/mouth
    InitDetParEyeMouthFromShape(detpar_roi, startshape);
    if (IsLeftFacing(eyaw))
    {
        detpar = FlipDetPar(detpar, img.cols);
        detpar.rot = -detpar.rot;
        detpar_roi.x += 2. * (face_roi.cols/2. - detpar_roi.x);
    }
}

} // namespace stasm