Color constancy: the role of low-level mechanisms.

Full Abstract

Color constancy (CC) is an important psychophysical phenomenon, which has been studied extensively. However, it is not clearly understood. This study presents a novel biological model for the contribution of low level mechanisms to CC. The model is based on two chromatic adaptation mechanisms in the color-coded retinal ganglion cells, 'local' and 'remote', which cause a 'curve-shifting' effect at each receptive field subregion. Simulations are employed for calculating the perceived image and measuring the degree of CC using both 'human-perception' and 'machine-vision' indices. The results indicate that the contribution of adaptations to CC is significant, robust and in agreement with experimental findings. The model is successful in performing CC under multiple chromatic illumination sources, a condition which mimics common natural environments.

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Author information

Author/s: Spitzer, Hedva (H); Rosenbluth, Avi (A);

Affiliation: Department of Biomedical Engineering, Faculty of Engineering, Tel Aviv University, Israel. hedva(-atsign-)eng.tau.ac.il

Journal and publication information

Publication Type: Journal Article

Journal: Spatial vision (Spat Vis), published in Netherlands. (Language: eng)

Reference: 2002-; vol 15 (issue 3) : pp 277-302

Dates: Created 2002/07/15; Completed 2003/01/10; Revised 2004/11/17;

PMID: 12116991, status: MEDLINE (last retrieval date: 11/6/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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