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This is to announce the availability of software implementing the edge/line detection methods described in the paper "Logical/Linear Operators for Image Curves" by Lee Iverson and Steven W. Zucker to be published in an upcoming PAMI. The implementation is both fast (considering the amount of computation done) and general, written in portable C. My home page can be found at: http://www.ai.sri.com/ leei/ The software is available at: ftp://ftp.cim.mcgill.ca/pub/people/leei/loglin.tar.gz and the accompanying paper (to appear in an upcoming PAMI): ftp://ftp.cim.mcgill.ca/pub/people/leei/loglin/loglin.ps.gz ABSTRACT We propose a language for designing image measurement operators suitable for early vision. We refer to them as "Logical/Linear" (L/L) operators, since they unify aspects of linear operator theory and boolean logic. A family of these operators appropriate for measuring the low-order differential structure of image curves is developed. These L/L operators are derived by decomposing a linear model into logical components to ensure that certain structural preconditions for the existence of an image curve are upheld. Tangential conditions guarantee continuity, while normal conditions select and categorize contrast profiles. The resulting operators allow for coarse measurement of curvilinear differential structure (orientation and curvature) while successfully segregating edge- and line-like features. By thus reducing the incidence of false-positive responses, these operators are a substantial improvement over (thresholded) linear operators which attempt to resolve the same class of features. Lee Iverson SRI International leei@ai.sri.com 333 Ravenswood Ave., Menlo Park CA 94025 http://www.ai.sri.com/ leei/ (415) 859-3307
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Maintained by Bob Duin, e-mail:
duin@ph.tn.tudelft.nl
Last update: February 17, 2004 |
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