Share Email Print

Proceedings Paper

Discounting Illuminants Beyond The Sensor Level
Author(s): Ron Gershon; Allan D. Jepson
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We propose a method, based on finite-dimensional linear models of reflectance and illumination, which allows the transformation of chromatic images into color constant images. This proves to be useful in applications where either there is no information on the illuminant present in the scene, or when such information is confounded by the existence of inter-reflections between objects. This method is aimed at computations taking place beyond the sensory level of vision systems, and may use inputs corrected by sensors. In contrast to previous work, we show that good results can be obtained using a 3-receptor system and some knowledge about the spectral properties of natural materials and illuminants. In the method developed, an estimate of illuminant in the scene is computed, which allows the computation of color constant descriptors of the pixel values in the image. In addition, we show a method of computing the actual reflect ances of the materials in the scene out of the computed color descriptors.

Paper Details

Date Published: 27 March 1989
PDF: 8 pages
Proc. SPIE 1002, Intelligent Robots and Computer Vision VII, (27 March 1989); doi: 10.1117/12.960281
Show Author Affiliations
Ron Gershon, Allied-Signal Canada Inc. (Canada)
Allan D. Jepson, University of Toronto (Canada)

Published in SPIE Proceedings Vol. 1002:
Intelligent Robots and Computer Vision VII
David P. Casasent, Editor(s)

© SPIE. Terms of Use
Back to Top