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Map-based exploration of intrinsic shape differences and variability

Published: 21 July 2013 Publication History

Abstract

We develop a novel formulation for the notion of shape differences, aimed at providing detailed information about the location and nature of the differences or distortions between the two shapes being compared. Our difference operator, derived from a shape map, is much more informative than just a scalar global shape similarity score, rendering it useful in a variety of applications where more refined shape comparisons are necessary. The approach is intrinsic and is based on a linear algebraic framework, allowing the use of many common linear algebra tools (e.g, SVD, PCA) for studying a matrix representation of the operator. Remarkably, the formulation allows us not only to localize shape differences on the shapes involved, but also to compare shape differences across pairs of shapes, and to analyze the variability in entire shape collections based on the differences between the shapes. Moreover, while we use a map or correspondence to define each shape difference, consistent correspondences between the shapes are not necessary for comparing shape differences, although they can be exploited if available. We give a number of applications of shape differences, including parameterizing the intrinsic variability in a shape collection, exploring shape collections using local variability at different scales, performing shape analogies, and aligning shape collections.

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Published In

cover image ACM Transactions on Graphics
ACM Transactions on Graphics  Volume 32, Issue 4
July 2013
1215 pages
ISSN:0730-0301
EISSN:1557-7368
DOI:10.1145/2461912
Issue’s Table of Contents
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than the author(s) must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected].

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Publication History

Published: 21 July 2013
Published in TOG Volume 32, Issue 4

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Author Tags

  1. data-driven methods
  2. shape comparison
  3. shape matching
  4. shape variability

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  • (2024)Computational Biomimetics of Winged SeedsACM Transactions on Graphics10.1145/368789943:6(1-13)Online publication date: 19-Dec-2024
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