We also proposed a new PCA method combined with edges, Improved the toss curve method extracting chin profile and tried to use Sin curve to extract chin profile.

• 同样对人脸下巴轮廓提取的抛物线方法也进行了改进,并对正弦曲线方法提取下巴轮廓的可行性和适用性进行了探讨;