The detection results of image edges are different morphologically for multi-scale structural elements.A new edge detection algorithm is therefore proposed introducing the structural elements of different scales,i.e.,the small-scale structural elements are dilated to become big-scale ones,then they are synthesized in a weighting way so as to form the edge image.Simulation results showed that for the blurred images mixed with different noises in concolorous background, the more the frequency of dilation,the ...