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  Colour constancy and colour pathways in human and macaque

Wade, A., Augath, M., Logothetis, N., & Wandell, B. (2004). Colour constancy and colour pathways in human and macaque. Perception, 33(ECVP Abstract Supplement), 25.

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Wade, A, Author
Augath, M1, 2, Author              
Logothetis, NK1, 2, Author              
Wandell, BA, Author
Affiliations:
1Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Human functional neuroimaging experiments have identified a colour area on the ventral surface of occipital cortex. However, the precise function, location, and extent of this area are disputed as is its possible homology with macaque V4. The discovery of this area has also diverted attention from measurements in other parts of the colour pathways. We present two results from our humans and macaque neuroimaging work. (i) Measurements in V1 show that changes in the background cone absorption rate influence the response gain to a constant-amplitude probe stimulus. The response gain appears to be controlled separately within each of the cone classes. These gain changes are significant for colour constancy and appear to be localised in the retina. (ii) Macaque cortex shows strong responses to isoluminant colour both dorsally and ventrally in V2 and V4. In humans, the largest responses to the same stimuli are confined to the ventral surface anterior to V3v. These data indicate that colour signals are processed in a pathway beginning at the retina and extending well into extrastriate cortex. Colour constancy is refined at several stages along this pathway. Finally, there appear to be differences between the humans and macaque colour pathways.

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 Dates: 2004-09
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: WadeALW2004
DOI: 10.1068/ecvp04a
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Title: 27th European Conference on Visual Perception (ECVP 2004)
Place of Event: Budapest, Hungary
Start-/End Date: 2004-08-22 - 2004-08-26

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Title: Perception
Source Genre: Journal
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Publ. Info: London : Pion Ltd.
Pages: - Volume / Issue: 33 (ECVP Abstract Supplement) Sequence Number: - Start / End Page: 25 Identifier: ISSN: 0301-0066
CoNE: https://pure.mpg.de/cone/journals/resource/954925509369