graph cut: Nuclei Segmentation Algorithms for Comparison: 1) Level Set: Matlab code by Yan Zhang (University of Central Lancashire) : "Segmenting and tracking fluoreschent cells in dynamic 3D microscopy with coupled active surfaces" TIP, 2005 2) Gradient flow tracking: . "3D celll nuclei segmentation based on gradient flow tracking", BMC Cell Biology. 2007 3) graph cut with a-expansion: "Improved automatic detection and segmentation of cell nuclei in histopathology images", TBE, 2010. 4)classic graph cut without shape prior: . "Fast approximate energy minimization via graph cuts", PAMI, 2001. image compression based on transformation and dictionary. 5)NMF Toolbox: 6) all kinds of toolbox : 7) deep learning