中文说明：RHT随机霍夫圆检测的方法，对灰度图像中的多个圆进行检测，效果相对于标准的hough圆检测准确度高，运行速度快。
English Description：
RHT random Hough circle detection method is used to detect multiple circles in gray image. Compared with the Standard Hough circle detection method, it has high accuracy and fast running speed.