'@brief get multi_face from a img'

def get_normalized_faces_from_image(self, img):

    bbs = self.getAllFaceBoundingBoxes(img)
    ret_bbs = []
    ret_faces = []
    if (bbs is not []):
        for bb in bbs:
            face = self.align_dlib_cpp(imgDim, img, bb)
            if (face is not None):
                ret_bbs.append((bb.left(), bb.right(), bb.top(), bb.bottom()))
                ret_faces.append(face)
    return (ret_bbs, ret_faces)
