C-V水平模型不利用梯度信息，而是通过最小化能量函数的方式来演化曲线。本程序对虹膜进行处理，将点阵初始化为一个圆，然后经过处理得到边缘。-CV-level model does not use gradient information, but by minimizing the energy function approach to the evolution curve. The procedure for processing of the iris, the lattice is initialized to a circle, and then processed to get the edge.