liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
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
Illumination Induced Changes in Image Statistics
Linköping University, The Institute of Technology. Linköping University, Department of Science and Technology, Digital Media.
Linköping University, The Institute of Technology. Linköping University, Department of Science and Technology, Digital Media.ORCID iD: 0000-0001-7557-4904
Linköping University, The Institute of Technology. Linköping University, Department of Science and Technology, Digital Media.
2006 (English)In: CGIV 2006, Third European Conference on Color in Graphics, Imaging and Vision, 7003 Kilworth Lane, Springfield, VA 22151 USA: The Society for Imaging Science and Technology , 2006, , 48-53 p.48-53 p.Conference paper, Published paper (Refereed)
Abstract [en]

We have previously shown that it is possible to construct a coordinate system in the space of illumination spectra such that the coordinate vectors of the illuminants are located in a cone. Changes in the space of illuminants can then be described by an intensity related scaling and a transformation in the Lorentz group SU(1,1). In practice it is often difficult and expensive to measure these coordinate vectors. Therefore it is of interest to estimate the characteristics of an illuminant from an RGB image captured by a camera. In this paper we will investigate the relation between sequences of illuminants and statistics computed from RGB images of scenes illuminated by these illuminants. As a typical example we will study sequences of black body radiators of varying temperature. We have shown earlier that black body radiators in the mired parametrization can be described by one-parameter groups of the Lorentz group SU(1,1). In this paper we will show that this group theoretical structure of the illuminant space induces a similar structure in spaces of statistical descriptors of the resulting RGB images. We show this relation for mean vectors of RGB images, for RGB histograms and for histograms of images obtained by applying certain spatiospectral linear filters to the RGB images. As a result we obtain estimates of the color temperature of the illuminant from sequences of RGB images of scenes under these illuminants.

Place, publisher, year, edition, pages
7003 Kilworth Lane, Springfield, VA 22151 USA: The Society for Imaging Science and Technology , 2006. , 48-53 p.48-53 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-34564Local ID: 21869ISBN: 0-89208-262-3 (print)OAI: oai:DiVA.org:liu-34564DiVA: diva2:255412
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2016-08-31

Open Access in DiVA

No full text

Authority records BETA

Bui, Hai ThanhLenz, ReinerSolli, Martin

Search in DiVA

By author/editor
Bui, Hai ThanhLenz, ReinerSolli, Martin
By organisation
The Institute of TechnologyDigital Media
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 244 hits
CiteExportLink to record
Permanent link

Direct link
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