head_list: 头（背景和发型）来源图片的路径的字符串列表，根据此列表在实例化时载入多个头像资源， 并获得面部识别点坐标，以字典形式存储，键名为文件名 predictor_path: dlib资源的路径
(self,heads_list=[],predictor_path="./data/shape_predictor_68_face_landmarks.dat")
source not stored for this graph (policy: none)
nothing calls this directly
no test coverage detected