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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 13 — Dec. 2, 2009

Approaching ideal observer efficiency in using color to retrieve information from natural scenes

David H. Foster, Iván Marín-Franch, Kinjiro Amano, and Sérgio M.C. Nascimento  »View Author Affiliations


JOSA A, Vol. 26, Issue 11, pp. B14-B24 (2009)
http://dx.doi.org/10.1364/JOSAA.26.000B14


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Abstract

Variations in illumination on a scene and trichromatic sampling by the eye limit inferences about scene content. The aim of this work was to elucidate these limits in relation to an ideal observer using color signals alone. Simulations were based on 50 hyperspectral images of natural scenes and daylight illuminants with correlated color temperatures 4000 K , 6500 K , and 25,000 K . Estimates were made of the (Shannon) information available from each scene, the redundancies in receptoral and postreceptoral coding, and the information retrieved by an observer identifying corresponding points across image pairs. For the largest illuminant difference, between 25,000 K and 4000 K , a postreceptoral transformation providing minimum redundancy yielded an efficiency of about 80% in the information retrieved. This increased to about 89% when the transformation was optimized directly for information retrieved, corresponding to an equivalent Gaussian noise amplitude of 3.0% or to a mean of 3.6 × 10 4 distinct identifiable points per scene. Using color signals to retrieve information from natural scenes can approach ideal observer efficiency levels.

© 2009 Optical Society of America

OCIS Codes
(330.1690) Vision, color, and visual optics : Color
(330.1720) Vision, color, and visual optics : Color vision
(330.1880) Vision, color, and visual optics : Detection
(330.4060) Vision, color, and visual optics : Vision modeling
(330.1715) Vision, color, and visual optics : Color, rendering and metamerism
(110.3055) Imaging systems : Information theoretical analysis

History
Original Manuscript: February 2, 2009
Revised Manuscript: June 17, 2009
Manuscript Accepted: July 12, 2009
Published: August 31, 2009

Virtual Issues
Vol. 4, Iss. 13 Virtual Journal for Biomedical Optics

Citation
David H. Foster, Iván Marín-Franch, Kinjiro Amano, and Sérgio M. C. Nascimento, "Approaching ideal observer efficiency in using color to retrieve information from natural scenes," J. Opt. Soc. Am. A 26, B14-B24 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-26-11-B14

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