Journal
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE
Volume 29, Issue 5, Pages 886-U1Publisher
IEEE COMPUTER SOC
DOI: 10.1109/TPAMI.2007.1027
Keywords
Laplacian operator; LoG operator; multistage median filter; edge detection
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Laplacian operator is a second derivative operator often used in edge detection. Compared with the first derivative-based edge detectors such as Sobel operator, the Laplacian operator may yield better results in edge localization. Unfortunately, the Laplacian operator is very sensitive to noise. In this paper, based on the Laplacian operator, a model is introduced for making some edge detectors. Also, the optimal threshold is introduced for obtaining a Maximum a Posteriori ( MAP) estimate of edges.
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