关键词: Canny边缘检测, 双边滤波, 类内方差, 类间方差

Abstract: Canny edge detection is a relatively new edge detection operator which has the very good edge detection performance. So it is a very wide range of application. However when it uses classic Canny edge detection algorithm, there is a large limit in removing noise and determining the thresholds. So in view of the above weaknesses, this paper puts forward a new adaptive Canny edge detection algorithm based on modified bilateral filtering. First bilateral filter which is modified is used to remove noise instead of traditional gaussian filter. This can remove the noise while retaining edge information better. In addition, the high threshold is got by making the rate of between-cluster difference and within-cluster difference largest in determining the thresholds, this can make the algorithm more adaptive. Theory and experimental results show that the algorithm has very good accuracy and practicability.

Key words: Canny edge detection, bilateral filtering, within-cluster difference, between-cluster difference