Harris角点提取程序，不仅提取角点，并将角点平均，提高角点的精度，另外，还按棋盘格的格式对角点进行适当的排序，为棋盘格的标定做数字准备。-Harris Corner Detection procedures, not only the extraction of corner points and corner points on average, improve the accuracy of corner, and also by the checkerboard grid format