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Proceedings Paper

Refinement of a model for predicting perceived brightness
Author(s): Ulrich Eisemann
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Paper Abstract

In this paper, an updated version of a previously proposed model for the prediction of perceived brightness is presented. The model is not only applicable to simple spatial configurations but also to complex scenes and relies entirely on physical and colorimetric data. These are derived from a complex description of the entire scene which eliminates the need for a priori knowledge like the popular reference white concept and others. The model includes an extensive preprocessing stage consisting of a central projection to transform the scene description into a pixel-oriented image, a simple pixel classification to identify the stimulus region and extensive histogram calculations to extract quantiles as characteristic features. Based on the quantiles, which form the output of the preprocessing stage and represent the distribution of luminance levels within the scene, a map has been implemented to calculate a value characterizing the perceived brightness. The development of the model structure was inspired by a series of haploscopic brightness matching experiments, whose experimental data were also used to train and test the model. The results are quite encouraging because the differences between experimental and model-predicted brightness values rarely exceed the range of the natural inter-observer deviations.

Paper Details

Date Published: 28 December 2001
PDF: 8 pages
Proc. SPIE 4663, Color Imaging: Device-Independent Color, Color Hardcopy, and Applications VII, (28 December 2001); doi: 10.1117/12.453012
Show Author Affiliations
Ulrich Eisemann, RWTH-Aachen (Germany)

Published in SPIE Proceedings Vol. 4663:
Color Imaging: Device-Independent Color, Color Hardcopy, and Applications VII
Reiner Eschbach; Gabriel G. Marcu, Editor(s)

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