中文说明：是由牛津大学VGG开发的三维重建开发包，其代码包括特征提取，单应矩阵计算，二视几何算法，多视几何的算法，是学习三维重建理论的好东西
English Description：
It is a 3D reconstruction development package developed by VGg of Oxford University. Its code includes feature extraction, homography matrix calculation, two view geometry algorithm and multi view geometry algorithm. It is a good thing to learn 3D reconstruction theory