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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 17, Iss. 2 — Feb. 1, 2000
  • pp: 218–224

Color signals in natural scenes: characteristics of reflectance spectra and effects of natural illuminants

Chuan-Chin Chiao, Thomas W. Cronin, and Daniel Osorio  »View Author Affiliations


JOSA A, Vol. 17, Issue 2, pp. 218-224 (2000)
http://dx.doi.org/10.1364/JOSAA.17.000218


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Abstract

Multispectral images of natural scenes were collected from both forests and coral reefs to represent typical, complex scenes that might be viewed by modern animals. Both reflectance spectra and modeled visual color signals in these scenes were decorrelated spectrally by principal-component analysis. Nearly 98% of the variance of reflectance spectra and color signals can be described by the first three principal components for both forest and coral reef scenes, which implies that three well-designed visual channels can recover almost all of the spectral information of natural scenes. A variety of natural illuminants affects color signals of forest scenes only slightly, but the variation in ambient irradiance spectra that is due to the absorption of light by water has dramatic influences on the spectral characteristics of coral reef scenes.

© 2000 Optical Society of America

OCIS Codes
(100.2960) Image processing : Image analysis
(110.4190) Imaging systems : Multiple imaging
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(120.5700) Instrumentation, measurement, and metrology : Reflection
(330.1720) Vision, color, and visual optics : Color vision

Citation
Chuan-Chin Chiao, Thomas W. Cronin, and Daniel Osorio, "Color signals in natural scenes: characteristics of reflectance spectra and effects of natural illuminants," J. Opt. Soc. Am. A 17, 218-224 (2000)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-17-2-218

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