从2d图片中提取轮廓特征，通过线性回归，建立从特征到3d人体姿态的回归函数，来实现人体3d姿态评估-Contours extracted from the 2d image features, by linear regression, the establishment of 3d human body posture from the feature to the return of function, to achieve the body posture assessment 3d