2 EDGE ORIENTATION FOR SECOND DERIVATIVE EDGE DETECTION METHODS

摘要

A kind of improved edge detection algorithm is provided, the edge orientation information at detected edge is provided using the second dervative of the intensity distribution function of image. One exemplary embodiment includes the second dervative that modified hydrothermal process determines intensity distribution function, identification horizontally and vertically on zero passage, to identified horizontally and vertically on mistake zero allocation angle information; Identify the edge and adjacent side of angle information horizontal zero crossing of the edge orientation based on distribution.