在C++环境下，利用opencv进行各种简单的图像处理，使我们基本了解opencv库函数使用方法-In C++ environment, using opencv variety of simple image processing, so that our basic understanding of the use of opencv library functions

利用opencv处理靶环图像，找到靶环中心，弹点，计算弹点到中心距离，得到射击靶环数-Image processing using opencv target ring, find the center of the target ring, playing the point, calculate the distance to the center point bullet, get a shot of the target number of rings