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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 21, Iss. 14 — Jul. 15, 1982
  • pp: 2569–2582

Lightness scale from image intensity distributions

W. A. Richards  »View Author Affiliations


Applied Optics, Vol. 21, Issue 14, pp. 2569-2582 (1982)
http://dx.doi.org/10.1364/AO.21.002569


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Abstract

A lightness scale is derived from a theoretical estimate of the probability distribution of image intensities for natural scenes. The derived image intensity distribution considers three factors: reflectance; surface orientation and illumination; and surface texture (or roughness). The convolution of the effects of these three factors yields the theoretical probability distribution of image intensities. A useful lightness scale should be the integral of this probability density function, for then equal intervals along the scale are equally probable and carry equal information. The result is a scale similar to that used in photography or by the nervous system as its transfer function.

© 1982 Optical Society of America

History
Original Manuscript: October 6, 1981
Published: July 15, 1982

Citation
W. A. Richards, "Lightness scale from image intensity distributions," Appl. Opt. 21, 2569-2582 (1982)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-21-14-2569

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