基于文献“对偶凸代价网络流问题算法在计算机视觉中的应用”对于凸网络流问题的一种原始对偶算法的实现-An implementation of the primal-dual method for the dual of the convex network flow problem ("Convex Markov Random Fields") described in New Algorithms for the Dual of the Convex Cost Networ