Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Encoding contour shape by curvature extrema

Not Accessible

Your library or personal account may give you access

Abstract

Curvature extrema provide significant information about the shape of an image contour, such as a silhouette, and are the basis for the Hoffman–Richards codon representation for shape. This representation based on curvature easily translates into a binary string that will describe the abstract shape of any smooth image curve. The computation of the basic shape primitives requires dealing with two ever-pervasive problems: contour noise and scale. We show how contour noise can be estimated given knowledge of the shape of the filter used to compute curvature from the edge list of the contour. To handle the scale problem, we use an adaptation of Witkin’s scale space. Our algorithm differs from Witkin’s by using a notion of parts to set criteria for significant structures.

© 1986 Optical Society of America

Full Article  |  PDF Article
More Like This
Mechanisms of contour curvature discrimination

Hugh R. Wilson and Whitman A. Richards
J. Opt. Soc. Am. A 6(1) 106-115 (1989)

Inferring three-dimensional shapes from two-dimensional silhouettes

W. A. Richards, Jan J. Koenderink, and D. D. Hoffman
J. Opt. Soc. Am. A 4(7) 1168-1175 (1987)

Description of solid shape and its inference from occluding contours

Jack M. H. Beusmans, Donald D. Hoffman, and Bruce M. Bennett
J. Opt. Soc. Am. A 4(7) 1155-1167 (1987)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved