本文提出了一种基于方向可变滤波器的改进Hough变换方法。该方法首先利用方向可变滤波器检测出图像边缘以及边缘的方向特性，然后基于边缘点及其方向，通过改进的Hough变换得到圆心、半径。最后，将该算法应用于球类对象分割并得到较好的结果。-In this paper, a variable filter based on the direction of improving the method of Hough transform. The direction of the first to use this method to detect variable edge filter, as well as the direction of the edge characteristics, and then based on the edge points and their direction, by improving the center of the Hough transform, radius. Finally, the object segmentation algorithm is applied to ball games and get better results.