Influence of the correlated color temperature of a light source on the color discrimination capacity of the observer

Pedro J. Pardo; Eduardo M. Cordero; María Isabel Suero; Ángel L. Pérez

doi:10.1364/JOSAA.29.00A209

Journal of the Optical Society of America A
Vol. 29,
Issue 2,
pp. A209-A215
(2012)
•https://doi.org/10.1364/JOSAA.29.00A209

Influence of the correlated color temperature of a light source on the color discrimination capacity of the observer

Pedro J. Pardo, Eduardo M. Cordero, María Isabel Suero, and Ángel L. Pérez

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Pedro J. Pardo, Eduardo M. Cordero, María Isabel Suero, and Ángel L. Pérez, "Influence of the correlated color temperature of a light source on the color discrimination capacity of the observer," J. Opt. Soc. Am. A 29, A209-A215 (2012)

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Table of Contents Category
- Chromatic discrimination
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About this Article
History
- Original Manuscript: September 1, 2011
- Revised Manuscript: November 8, 2011
- Manuscript Accepted: December 2, 2011
- Published: January 26, 2012
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Virtual Journal for Biomedical Optics Vol. 7, Iss. 4

Abstract

It is well known that there are different preferences in correlated color temperature of light sources for daily living activities or for viewing artistic paintings. There are also data relating the capacity of observers to make judgments on color differences with the spectral power distribution of the light source used. The present work describes a visual color discrimination experiment whose results confirm the existence of a relationship between the correlated color temperature of a light source and the color discrimination capacities of the observers.

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			$Δ E_{00}^{*}$
Item $n °$	Sample	Sample’	2800	5000 Low	5000 Medium	5000 High	6500
1	2005-Y70R	2005-Y70R	0.08	0.07	0.07	0.07	0.07
2	2570-Y30R	2570-Y30R	0.09	0.09	0.09	0.09	0.09
3	3030-R70B	3030-R70B	0.06	0.06	0.06	0.06	0.06
4	0603-R60B	0505-R60B	1.10	1.12	1.12	1.12	1.15
5	2005-Y90R	2005-Y80R	1.20	1.26	1.27	1.27	1.35
6	1005-R90B	1005-R90B	0.10	0.08	0.08	0.08	0.08
7	1005-R30B	1005-R40B	0.97	1.21	1.20	1.14	0.86
8	1005-Y40R	1005-Y40R	0.06	0.06	0.06	0.06	0.06
9	1505-Y20R	1505-Y20R	0.18	0.18	0.17	0.18	0.17
10	0505-R90B	0505-R80B	1.95	1.90	1.91	1.95	2.24
11	2005-G60Y	2005-G60Y	0.04	0.04	0.04	0.04	0.04
12	2005-G40Y	2005-G30Y	0.77	0.63	0.63	0.63	0.59
13	0505-G20Y	0505-G30Y	2.30	1.86	1.83	1.82	1.58
14	1505-G90Y	1505-G90Y	0.29	0.28	0.28	0.29	0.29
15	1005-R80B	1005-R80B	0.07	0.07	0.07	0.07	0.07
16	0505-G10Y	0505-G10Y	0.16	0.17	0.17	0.17	0.17
17	2005-Y20R	2005-Y30R	1.96	1.88	1.88	1.89	1.90
18	0510-G90Y	0510-G80Y	1.85	1.68	1.66	1.64	1.47
19	5540-G60Y	5540-G60Y	0.57	0.57	0.56	0.56	0.55
20	1505-Y80R	1505-Y90R	1.02	1.04	1.04	1.05	1.07

	Name	RGBA2800	RGBA5000Low	RGBA5000Medium	RGBA5000High	RGBA6500	CIE D65 Simulator
Light sources	CCT	2826.4	4907.2	4983.2	4931.4	6495.5	6553.3
	Luminance ( $cd / m^{2}$ )	171.95	55.61	98.91	172.11	165.01	182.9
	CRI	53.22	71.55	71.24	68.97	58.97	95.62
	GAI	66.59	108.38	109.91	113.38	133.71	93.01

Entire sample	% correct responses	61.39	61.25	63.47	61.53	62.92	69.58
Entire sample	$σ$	10.2	10.1	11.0	10.7	9.9	10.6
Best observers	% correct responses	66.15	67.69	71.54	69.62	70.38	77.31
Best observers	$σ$	6.1	6.0	6.5	6.3	5.9	6.3

Division Criteria: CCT	% Correct Responses Best Observers Group		Division Criteria: Luminance	% Correct Responses Best Observers Group
Source	Matching pairs	Different pairs	Source	Matching pairs	Different pairs
RGBA2800	90.1	61.1	RGBA5000 Low	90.1	71.3
RGBA5000 High	86.4	69.5	RGBA5000 Medium	90.1	70.4
RGBA6500	89.4	79.6	RGBA5000 High	86.4	68.5
ANOVA (P-value)	0.59	0.02*	ANOVA (P-value)	0.46	0.88

			$Δ E_{00}^{*}$
Item $n °$	Sample	Sample’	2800	5000 Low	5000 Medium	5000 High	6500
1	2005-Y70R	2005-Y70R	0.08	0.07	0.07	0.07	0.07
2	2570-Y30R	2570-Y30R	0.09	0.09	0.09	0.09	0.09
3	3030-R70B	3030-R70B	0.06	0.06	0.06	0.06	0.06
4	0603-R60B	0505-R60B	1.10	1.12	1.12	1.12	1.15
5	2005-Y90R	2005-Y80R	1.20	1.26	1.27	1.27	1.35
6	1005-R90B	1005-R90B	0.10	0.08	0.08	0.08	0.08
7	1005-R30B	1005-R40B	0.97	1.21	1.20	1.14	0.86
8	1005-Y40R	1005-Y40R	0.06	0.06	0.06	0.06	0.06
9	1505-Y20R	1505-Y20R	0.18	0.18	0.17	0.18	0.17
10	0505-R90B	0505-R80B	1.95	1.90	1.91	1.95	2.24
11	2005-G60Y	2005-G60Y	0.04	0.04	0.04	0.04	0.04
12	2005-G40Y	2005-G30Y	0.77	0.63	0.63	0.63	0.59
13	0505-G20Y	0505-G30Y	2.30	1.86	1.83	1.82	1.58
14	1505-G90Y	1505-G90Y	0.29	0.28	0.28	0.29	0.29
15	1005-R80B	1005-R80B	0.07	0.07	0.07	0.07	0.07
16	0505-G10Y	0505-G10Y	0.16	0.17	0.17	0.17	0.17
17	2005-Y20R	2005-Y30R	1.96	1.88	1.88	1.89	1.90
18	0510-G90Y	0510-G80Y	1.85	1.68	1.66	1.64	1.47
19	5540-G60Y	5540-G60Y	0.57	0.57	0.56	0.56	0.55
20	1505-Y80R	1505-Y90R	1.02	1.04	1.04	1.05	1.07

	Name	RGBA2800	RGBA5000Low	RGBA5000Medium	RGBA5000High	RGBA6500	CIE D65 Simulator
Light sources	CCT	2826.4	4907.2	4983.2	4931.4	6495.5	6553.3
	Luminance ( $cd / m^{2}$ )	171.95	55.61	98.91	172.11	165.01	182.9
	CRI	53.22	71.55	71.24	68.97	58.97	95.62
	GAI	66.59	108.38	109.91	113.38	133.71	93.01

Entire sample	% correct responses	61.39	61.25	63.47	61.53	62.92	69.58
Entire sample	$σ$	10.2	10.1	11.0	10.7	9.9	10.6
Best observers	% correct responses	66.15	67.69	71.54	69.62	70.38	77.31
Best observers	$σ$	6.1	6.0	6.5	6.3	5.9	6.3

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