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The Bayesian Operating Point of the Canny Edge Detector

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2 Author(s)
Yang Zhang ; Dept. of Electron. & Electr. Eng., Univ. of Sheffield ; Rockettt, P.I.

We have investigated the operating point of the Canny edge detector which minimizes the Bayes risk of misclassification. By considering each of the sequential stages which constitute the Canny algorithm, we conclude that the linear filtering stage of Canny, without postprocessing, performs very poorly by any standard in pattern recognition and achieves error rates which are almost indistinguishable from a priori classification. We demonstrate that the edge detection performance of the Canny detector is due almost entirely to the postprocessing stages of nonmaximal suppression and hysteresis thresholding

Published in:

Image Processing, IEEE Transactions on  (Volume:15 ,  Issue: 11 )

Date of Publication:

Nov. 2006

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