评价图像边界的好坏，FOM值越趋于1质量越好。-figure of merit to objectively evaluate the performance of edge detectors

Edge preservation measure Index: Pratt s Figure of Merit

1. 读取学生成绩单文件2. 存入数组， 第一列存3.依次根据成绩判定等级（60分以下D， 60-79C，80-90B，90-99A，100A+ ）并将等级结果存到对应的数组里学好，第二列存成绩，第三列留给等级4.请画出成绩等级分布图（2D），函数任选5.请画3D图，函数任选 6. 通过subplot,重画上面两个图，形成一个合成图，上下分布-Read student transcr ipt file into an array, the first column of memory 3 the

A figure of merit is a quantity used to characterize the performance of a device, system or method, relative to its alternatives. In engineering, figures of merit are used as a marketing tool to convince consumers to choose a particular brand.