Algorithm of Edge Detection Based on LOG and Canny Operator
Yan Li · Jisuanji gongcheng · 2011
Aiming at the disability of traditional Canny operator in noise suppression and detecting low-intensity edge,this paper proposes an edge detection method combined LOG operator and Canny operator.LOG operator is used to the picture for noise filtering and Canny operator is improved in the flowing three aspects to execute the edge detection:(1)It designs Gaussian smoothing kernel to intense the edge of picture filtered noise,which makes the low-intensity edge detect easily;(2)Gradient magnitude and direction are calculated by pixels within a M-by-N neighborhood;(3)It integrates gradient direction with the calculation of gradient magnitude,which can be the ground for gradient magnitude in edge detection.Through carrying out a lot experiment for picture increased salt and pepper noise,the method proposed in this paper can not only suppress noise in the largest degree,but also detect more low-intensity edge.