An improved edge detector based on the Laplacian operator

In this paper, we propose an improved edge detection method based on the Laplacian operator. The improved edge detector is constructed by combining the optimal criteria for zero-crossing based edge detector and the edge-matching model for Laplacian operator-based edge detector. In order to extract the edges objectively, an unsupervised thresholding technique is introduced. Finally, the validity of the new edge detector is shown by some comparison experiments.