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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 15, Iss. 11 — Nov. 1, 1998
  • pp: 2913–2920

Analyzing the spectral dimensionality of outdoor visible and near-infrared illumination functions

David Slater and Glenn Healey  »View Author Affiliations

JOSA A, Vol. 15, Issue 11, pp. 2913-2920 (1998)

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The spectral properties of outdoor illumination functions can vary significantly, owing to atmospheric conditions and scene geometry. Using a statistical analysis of a comprehensive physical model, we show that the variation in outdoor illumination functions over both the visible range (0.33–0.7 µm) and the visible/near-infrared range (0.4–2.5 µm) can be represented accurately by use of seven-dimensional linear models. The physical model includes solar and scattered radiation as well as the effects of atmospheric gases and aerosols. The modtran 3.5 code was employed for computing radiative transfer aspects of the model. We show that the new model has strong agreement over the visible wavelengths with the empirical study of Judd [J. Opt. Soc. Am. 54, 1031 (1964)]. We also demonstrate the accuracy of the model over the 0.4–2.5-µm spectral range, using measured outdoor illumination functions.

© 1998 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(150.2950) Machine vision : Illumination
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(330.1690) Vision, color, and visual optics : Color

Original Manuscript: February 17, 1998
Revised Manuscript: August 11, 1998
Manuscript Accepted: May 29, 1998
Published: November 1, 1998

David Slater and Glenn Healey, "Analyzing the spectral dimensionality of outdoor visible and near-infrared illumination functions," J. Opt. Soc. Am. A 15, 2913-2920 (1998)

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