Morphological Edge Detection Algorithm Based on Multi-structure Elements Compound Filter

In order to improve the performance of morphological edge detection algorithm,a compound filter with multi-structure elements was designed.At the same time,a morphological gradient with orientation was defined.On the basis of that,a noise immune morphological edge detection algorithm was presented.Noise suppression and detail preservation capability of morphological transformation mode and structure element were developed sufficiently.Edge was detected with structure elements which possessed direction information,and it was thinned with one pixel width by implementing non-maxima suppression along the orientation of gradient.Simulation results indicate that the proposed algorithm not only performs better in edge detection,noise immunity and processing speed.