Being an isotopic,classic Laplacian of Gaussian(LOG) edge detect operator only can detect image edges in all directions isotopically.The parameters of angle information were introduced into classic LOG operator for edge detection and deduced mathematically.It is symmetrical as ellipse instead of circle,and can detect models in rotary angle edge by the coordinate axis.Moreover,it can effectively detect the edges in different orientations that strengthen the edge detection capability.After comparative experim...