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The Hyperbolic Geometry of Illumination-Induced Chromaticity Changes
Linköping University, Department of Science and Technology, Digital Media. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-7557-4904
Comp. Languages and Systems, Ja ume I University, Castell ́ on, Spain.
Electrical and Computer Eng., Rut gers University, Piscataway, USA.
2007 (English)In: IEEE Conference on Computer Vision and Pattern Recognition, CVPR '07., IEEE Computer Society, 2007, 1-6 p.Conference paper, Published paper (Refereed)
Abstract [en]

The non-negativity of color signals implies that they span a conical space with a hyperbolic geometry. We use perspective projections to separate intensity from chromaticity, and for 3-D color descriptors the chromatic properties are represented by points on the unit disk. Descriptors derived from the same object point but under different imaging conditions can be joined by a hyperbolic geodesic. The properties of this model are investigated using multichannel images of natural scenes and black body illuminants of different temperatures. We show, over a series of static scenes with different illuminants, how illumination changes influence the hyperbolic distances and the geodesics. Descriptors derived from conventional RGB images are also addressed.

Place, publisher, year, edition, pages
IEEE Computer Society, 2007. 1-6 p.
Series
IEEE Conference on Computer Vision and Pattern Recognition. Proceedings, ISSN 1063-6919
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-38247DOI: 10.1109/CVPR.2007.383212ISI: 000250382803056Local ID: 43105ISBN: 1-4244-1179-3 (print)ISBN: 1-4244-1180-7 (print)OAI: oai:DiVA.org:liu-38247DiVA: diva2:259096
Conference
IEEE Conference on Computer Vision and Pattern Recognition, CVPR '07, Minneapolis, MN, USA, 17-22 June 2007
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2016-08-31Bibliographically approved

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Lenz, Reiner

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf