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  Spatial features and chromatic adaptation

Werner, A., & Sharpe, L. (2002). Spatial features and chromatic adaptation. Perception, 31(ECVP Abstract Supplement), 16.

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Werner, AMC1, Author              
Sharpe, LT, Author
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 Abstract: Colour constancy employs the classification and integration of edge signals over large parts of a scene. However, the properties of the actual physiological processes underlying such large field computations are little understood. In previous experiments, we found that the early time-course (0.2 s ^ 5 s) of mid-spectral chromatic adaptation is accelerated by a cortical mechanism that responds to contrast in the adaptation pattern (Werner et al, 2000 Vision Research 40 1101 ^ 1113). In our new experiments, we investigated the properties of this spatial component of chromatic adaptation. The pattern (15.4 deg613.2 deg) was presented on a calibrated colour monitor and consisted of horizontal stripes of different luminances. For the reference condition, it was achromatic (u 0 ˆ 0:197, v 0 ˆ 0:468; Lmean ˆ 19:3 cd mÿ2 ). Chromatic adaptation was measured for the transition from D65 adaptation to a 5 s green adaptation light located in an equiluminous plane in colour space. The effect of chromatic adaptation was measured by a hue- cancellation technique, which involved maintaining the achromatic appearance of a central test patch (2.2 deg62.4 deg). Our results provide evidence for a spatial mechanism of chromatic adaptation, which responds to the spatial features of the adaptation pattern, namely its spatial frequency and orientation.

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 Dates: 2002-08
 Publication Status: Published in print
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 Identifiers: DOI: 10.1177/03010066020310S101
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Title: 25th European Conference on Visual Perception (ECVP 2002)
Place of Event: Glasgow, UK
Start-/End Date: 2002-08-25 - 2002-08-29

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Title: Perception
Source Genre: Journal
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Publ. Info: London : Pion Ltd.
Pages: - Volume / Issue: 31 (ECVP Abstract Supplement) Sequence Number: - Start / End Page: 16 Identifier: ISSN: 0301-0066
CoNE: https://pure.mpg.de/cone/journals/resource/954925509369