Visual assessment of light source color quality

被引:21
|
作者
Bodrogi, Peter [1 ]
Brueckner, Stefan [1 ]
Tran Quoc Khanh [1 ]
Winkler, Holger [2 ]
机构
[1] Tech Univ Darmstadt, Lab Lighting Technol, D-64289 Darmstadt, Germany
[2] Merck KGaA, D-64293 Darmstadt, Germany
来源
COLOR RESEARCH AND APPLICATION | 2013年 / 38卷 / 01期
关键词
color quality; light sources; factor analysis; interobserver variability; color rendering; color preference; color fidelity; brightness; color gamut; DISCRIMINATION; CONTRAST; INDEX;
D O I
10.1002/col.20726
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The color quality of the lit visual environment can be improved by optimizing light source spectral power distributions. For a comprehensive optimization, it is important to identify the relationship among the perceptual properties of color quality. In this work, a colorful still life or tabletop arrangement was constructed from real artificial objects. Thirty observers with normal color vision scaled nine different properties of color quality under three light sources, incandescent, fluorescent and white LED. Six factors were extracted from the correlations among the obtained visual color quality scales. Factors were assigned the following labels: memory, preference, brightness, fidelity, gamut and difference. Mean factor values were computed for each light source. Significant differences were found in case of preference, brightness and fidelity: for preference, INC was rated better than CFL and LED was rated better than CFL, for brightness, LED was better than INC and LED was better than CFL and for fidelity, INC was better than CFL and INC was better than LED. The brightness factor was consistent among the observers. Three clusters of observers were found for preference and fidelity. The memory, gamut and difference factors showed large interobserver variability. (c) 2011 Wiley Periodicals, Inc. Col Res Appl, 2013
引用
收藏
页码:4 / 13
页数:10
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