Spectral information and spatial color computation

Alessandro Rizzi; Davide Gadia; Daniele Marini

doi:10.1117/12.585896

17 January 2005 Spectral information and spatial color computation

Alessandro Rizzi, Davide Gadia, Daniele Marini

Proceedings Volume 5667, Color Imaging X: Processing, Hardcopy, and Applications; (2005) https://doi.org/10.1117/12.585896
Event: Electronic Imaging 2005, 2005, San Jose, California, United States

Abstract

In real world no color exists. Only spectral light distributions interact to form the final color sensation. This paper presents preliminary experiments whose purpose is to test the robustness of a spatial color computation in relation to changes in the acquisition of spectral information. The basic idea is that human vision system has evolved into a robust system to acquire visual information, in this case the color, adapting to varying illumination conditions to guarantee color constancy. The presented experiments test changes in the output of a Retinex-derived tone mapping operator, varying illuminants and color matching function curves. Synthetic high dynamic range multispectral images have been computed by a photometric ray tracer using different illuminants. Then, using standard and modified color matching functions, a set of high dynamic range RGB images has been created. This set has been converted to standard RGB images using a linear tone mapping algorithm with no spatial color computation and one based on Retinex, performing a spatial color normalization. A discussion of the results is presented.

Citation Download Citation

Alessandro Rizzi, Davide Gadia, and Daniele Marini "Spectral information and spatial color computation", Proc. SPIE 5667, Color Imaging X: Processing, Hardcopy, and Applications, (17 January 2005); https://doi.org/10.1117/12.585896

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