OpenCV库根据提供的数组画数据图，使用这个库可以在屏幕上，或者图像上画曲线图。可以在测试一个算法时，非常方便的观察到数字数组。-Showing a simple graph of an array.This　library　is just a collection of functions that can be used to simply plot a graph of an array in its own window, or to overlay graphs into existing an IplImage. This makes it both easy to use and powerful enough for more complex uses such as combining multiple graphs into one.