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What is the spectral dimensionality of illumination functions in outdoor scenes?

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2 Author(s)
Slater, D. ; Comput. Vision Lab., California Univ., Irvine, CA, USA ; Healey, G.

The spectral properties of outdoor illumination functions can vary significantly due to atmospheric conditions and scene geometry. The authors show using a statistical analysis of a comprehensive physical model that the variation in outdoor illumination functions over both the visible range (0.33 μm-0.7 μm) and the visible/near-infrared range (0.4 μm-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. The authors show that the new model has strong agreement over the visible wavelengths with the empirical study of Judd et al. (1964). The authors also demonstrate the accuracy of the model over the 0.4 μm-2.5 μm spectral range using measured outdoor illumination functions

Published in:

Computer Vision and Pattern Recognition, 1998. Proceedings. 1998 IEEE Computer Society Conference on

Date of Conference:

23-25 Jun 1998