To complete the topographical reconstruction with a single crater image in the Second Phase of Lunar Exploration,the paper proposed a new SFS algorithm for 3D recovery with the regularization constraint based on the Lommel-Seeliger reflectance model.It took gradient ratio of the points on characteristic line as the basis,got the gradient ratio of all the points within the crater,and regularized the reflection equation.Finally simulated image and lunar crater images were taken for verification analysis.The r...