面部特征点识别，勾勒出面部轮廓，眼睛轮廓，以及嘴巴鼻子的轮廓，适合借鉴参考，完全什么都不会的伸手党就不要看了-Facial recognition feature points, and sketched out facial contours, eye contour, mouth and nose outline for draw reference, exactly what the party will not reach out, do not read