对人脸图像进行检测，然后根据灰度信息定位出眼睛、嘴巴的位置，并根据这三个位置计算人脸偏转的角度-Face image detection, and then locate the information in accordance with the gray eyes, mouth position and face deflection angle is calculated based on these three locations

Image matting is the extraction of a foreground object from an image and determination of the transparency of each pix- el. Matting is inherently an ill-posed and underconstrained problem. Therefore, some assumptions need to be made to solve