GrabCut 迭代图割算法实现：其中只有部分k—means算法和maxflow算法调用opencv库，其程序可以随意更改，测试算法时间，做改进算法练习-GrabCut iterative graph cut algorithm: where only part of the k-means algorithm and maxflow algorithm calls opencv library, the program can change, time to test the algorith