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Saturation as a function of test‐field size and surround luminance

Saturation as a function of test‐field size and surround luminance Direct scaling procedures were used to estimate the apparent saturation (colourfulness) of chromatic test fields as a function of (1) the ratio of the luminance of a test field to that of an achromatic surround, and (2) the test‐field subtense. It was found that saturation was maximised when the test field and surround were at an approximate brightness match, and that increasing the test‐field size in the range of 10.0'–10.0° caused a monotonic increase in saturation in the presence of relatively dim surrounds, but if the surrounds were brighter than the test field, a peak saturation was found for 1° test fields. These findings are consistent with a model of the visual system in which separate comparisons are made of (a) centre and surround luminance, and (b) centre chromatic and achromatic activity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Color Research & Application Wiley

Saturation as a function of test‐field size and surround luminance

Color Research & Application , Volume 7 (2) – Jun 1, 1982

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References (23)

Publisher
Wiley
Copyright
Copyright © 1982 Wiley Periodicals, Inc., A Wiley Company
ISSN
0361-2317
eISSN
1520-6378
DOI
10.1002/col.5080070205
Publisher site
See Article on Publisher Site

Abstract

Direct scaling procedures were used to estimate the apparent saturation (colourfulness) of chromatic test fields as a function of (1) the ratio of the luminance of a test field to that of an achromatic surround, and (2) the test‐field subtense. It was found that saturation was maximised when the test field and surround were at an approximate brightness match, and that increasing the test‐field size in the range of 10.0'–10.0° caused a monotonic increase in saturation in the presence of relatively dim surrounds, but if the surrounds were brighter than the test field, a peak saturation was found for 1° test fields. These findings are consistent with a model of the visual system in which separate comparisons are made of (a) centre and surround luminance, and (b) centre chromatic and achromatic activity.

Journal

Color Research & ApplicationWiley

Published: Jun 1, 1982

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