A Computational Approach to Edge Detection A (一个计算边缘检测方法).pdf
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EE6358 Computer Vision
A Computational Approach to Edge Detection
A Summarized Report
Tanmay Zargar
June 7, 2004
© The University of Texas at Arlington
Organization of the paper
Introduction
Mathematical formulation
– Detection, Localization and Multiple responses
Optimal Detectors by Numerical Optimization
Detector for Step Edges
An efficient approximation
2 The University of Texas at
June 7, 2004 Arlington
Organization of the paper (contd.)
Noise estimation and thresholding
Multi dimensions
Need for multiple widths
Need for directional operators
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June 7, 2004 Arlington
One dimensional formulation
Identification of the performance criteria.
– Detection
– Localization
– Single response to an edge
Mathematical formulation
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June 7, 2004 Arlington
Mathematical Formulation
Detection analogous to SNR.
Localization formulated as the reciprocal of
the deviation of point marked as edge from
the center of true edge.
Trivial maximization of the SNR-Localization
product.
Elimination of maxima in the vicinity of the
edge; spatial scaling.
The University of Texas at
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