Constraints on the design of template masks for edge detection

Authors:
E. R. Davies
Affiliations:
Pattern Recognition & Industrial Inspection Group, Department of Physics, Royal Holloway & Bedford New College, Egham Hil, Egham, Surrey TW20 0EX, United Kingdom
Venue:
Pattern Recognition Letters
Year:
1986

Citing 6
Cited 0

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Abstract

This paper studies the design of template masks for edge detection, and develops the underlying theory with particular reference to computational accuracy. The concept of circularity is shown to be important for the design of 'general purpose' template matching operators. A number of design constraints are enuciated: in particular it is found that different masks are required for the accurate estimation of edge magnitude and edge orientation; in either case they need to be tailored to the relevant edge profile. The Sobel coefficient is obtained in the closed form (frsol|13@/2-4)/7 @?2.055.