JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
Online ISSN : 1349-838X
Print ISSN : 0019-2341
ISSN-L : 0019-2341
Original Papers
Effects of Central Luminance on Perceived Brightness of Surrounding Area
Qianying DaiYoshiki Nakamura
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JOURNALS FREE ACCESS

2012 Volume 96 Issue 5 Pages 286-292

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Abstract

In this experiment, observers estimated the perceived brightness of a central and surrounding area under varying luminances, luminance ratios, and central area sizes by using a 13-step scale in a lighting condition with two different luminance areas.
1. Perceived brightness in the surrounding area was darker than usual in the high central luminance condition.
2. Perceived brightness in the surrounding area was different from that in the central area and changed independently.
3. Perceived brightness had a linear relation to the luminance logarithm in two areas, consistent with Weber & Fechner's logarithmic law. In addition, the linear regressions' coefficients changed depending on the contrasts (luminance ratio) and central area sizes.

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© 2012 The Illuminating Engineering Institute of Japan
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