Retinal Image Graph-Cut Segmentation Algorithm Using Multiscale Hessian-Enhancement-Based Nonlocal Mean Filter. - Jian Zheng 001; Pei-Rong Lu; Dehui Xiang; Yakang Dai; Zhaobang Liu; Duojie Kuai; Hui Xue; Yue-Tao Yang (Comput. Math. Methods Medicine, 2013)