On computing visual flows with boundaries: The case of shading and edges

Ohad Ben-Shahar, Patrick S. Huggins, Steven W. Zucker

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

Many visual tasks depend upon the interpretation of visual structures that are flow fields, such as optical flow, oriented texture, and shading. The computation of these visual flows involves a delicate tradeoff: imaging imperfections lead to noisy and sparse initial flow measurements, necessitating further processing to infer dense coherent flows; this processing typically entails interpolation and smoothing, both of which are prone to destroy visual flow discontinuities. However, discontinuities in visual flows signal corresponding discontinuities in the physical world, thus it is critical to preserve them while processing the flow. In this paper we present a computational approach motivated by the architecture of primary visual cortex that directly incorporates boundary information into a flow relaxation network. The result is a robust computation of visual flows with the capacity to handle noisy or sparse data sets while providing stability along flow boundaries. We demonstrate the effectiveness of our approach by computing shading flows in images with intensity edges.

Original languageEnglish
Title of host publicationBiologically Motivated Computer Vision - 2nd International Workshop, BMCV 2002, Proceedings
EditorsHeinrich H. Bulthoff, Christian Wallraven, Seong-Whan Lee, Tomaso A. Poggio
PublisherSpringer Verlag
Pages189-198
Number of pages10
ISBN (Electronic)9783540001744
DOIs
StatePublished - 1 Jan 2002
Externally publishedYes
Event2nd International Workshop on Biologically Motivated Computer Vision, BMCV 2002 - Tubingen, Germany
Duration: 22 Nov 200224 Nov 2002

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume2525
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference2nd International Workshop on Biologically Motivated Computer Vision, BMCV 2002
Country/TerritoryGermany
CityTubingen
Period22/11/0224/11/02

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