graphcut 入门 方法 经典文献 Fast Approximate Energy Minimization via Graph Cuts Interactive Graph Cuts for Optimal Boundary & Region Segmentation KBR-ICCV07Applications of parametric maxflow in computer vision Markov Random Fields with Efficient Approximations ijcv06Graph Cuts and Efficient N-D Image Segmentation ICCV01Interactive Graph Cuts for Optimal Boundary & Region Segmentation Interactive Organ Segmentation using Graph Cuts Hierarchical Segmentation Satisfying Constraints Exact Maximum A Posteriori Estimation for Binary Images