中文说明：recon基于双视图的人脸特征三维重建，一个视图为正投影，另一个是水平方向旋转，假定正交投影模型，getfeature用于从图像上标记特征点
English Description：
Recon is a 3D reconstruction of facial features based on two views. One view is orthographic projection, and the other is horizontal rotation. Assuming orthogonal projection model, getfeature is used to mark feature points from the image