A New Method of Edge Detection Based on the Laplacian Operator

Laplacian operator is a second derivative operator,which can detect the edge by the zero-crossings in the second derivative. The Laplacian operator can detect the intensity abrupt change and get better result in edge localization,but it is sensitive to noise.In this paper,using max/min median filter,a new method based on the Laplacian operator-based edge detection model(EDM) is proposed,which can smooth noise while detecting the edges.Experimental results illustrate that the method has a good noise removing performance and can provide a satisfactory result in detecting edges.