计算机视觉领域，检测棋盘格角点算法：可以读取不同的图像及数量，并返回角点坐标-In the fields of computer vision, detection checkerboard Angle point is: can read different image and quantity, and returns Angle point coordinates

基于opencv实现的截图功能，可以读取截图时的起点坐标和终点坐标并显示，效果还不错。-Based on opencv realized screenshot function, the starting point and end point coordinates can be read and displayed when shot, the results were good.

读取图像，识别图像中的所有圆，并在控制台输出圆心坐标-Extract the circle in the image and output the center coordinates