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Chromatic discrimination in relation to luminance level

2001; Wiley; Volume: 26; Issue: 2 Linguagem: Inglês

10.1002/1520-6378(200104)26

1520-6378

Ana María Romero Yebra, Jose-luis Garc�a, Juan L. Nieves, J. Romero,

Color perception and design

Color Research & ApplicationVolume 26, Issue 2 p. 123-131 Article Chromatic discrimination in relation to luminance level A. Yebra, Corresponding Author A. Yebra [email protected] Departamento de Óptica, Universidad de Granada, Avda. Fuentenueva, s/n, E-18004 Granada, SpainDepartamento de Óptica, Universidad de Granada, Avda. Fuentenueva, s/n, E-18004 Granada, SpainSearch for more papers by this authorJ. A. García, J. A. García Departamento de Óptica, Universidad de Granada, Avda. Fuentenueva, s/n, E-18004 Granada, SpainSearch for more papers by this authorJ. L. Nieves, J. L. Nieves Departamento de Óptica, Universidad de Granada, Avda. Fuentenueva, s/n, E-18004 Granada, SpainSearch for more papers by this authorJ. Romero, J. Romero Departamento de Óptica, Universidad de Granada, Avda. Fuentenueva, s/n, E-18004 Granada, SpainSearch for more papers by this author A. Yebra, Corresponding Author A. Yebra [email protected] Departamento de Óptica, Universidad de Granada, Avda. Fuentenueva, s/n, E-18004 Granada, SpainDepartamento de Óptica, Universidad de Granada, Avda. Fuentenueva, s/n, E-18004 Granada, SpainSearch for more papers by this authorJ. A. García, J. A. García Departamento de Óptica, Universidad de Granada, Avda. Fuentenueva, s/n, E-18004 Granada, SpainSearch for more papers by this authorJ. L. Nieves, J. L. Nieves Departamento de Óptica, Universidad de Granada, Avda. Fuentenueva, s/n, E-18004 Granada, SpainSearch for more papers by this authorJ. Romero, J. Romero Departamento de Óptica, Universidad de Granada, Avda. Fuentenueva, s/n, E-18004 Granada, SpainSearch for more papers by this author First published: 05 February 2001 https://doi.org/10.1002/1520-6378(200104)26:2 3.0.CO;2-WCitations: 15AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract We have measured the chromatic-discrimination ellipses with different luminances for 66 stimuli distributed throughout the CIE-1931 chromatic diagram. The distribution of these stimuli enabled us to analyze the influence of luminance on discrimination from clearly photopic levels to levels that could enter the mesopic range. The results show a clear influence of the luminance level on the areas of the chromatic-discrimination ellipses. These areas remain almost constant when the luminance level is clearly photopic, and clearly increase when the luminance diminishes. However, it is not necessary that the luminance level diminish far below 2–3 cd/m2 to detect a substantial increase in the area of the ellipses. According to our data, within the photopic range appears a transition interval of luminance above which the most pronounced increase in the area of the ellipse would be appreciable. Other parameters characteristic of discrimination ellipses, such as orientation and relation to semi-axes, vary with the luminance level, although without clearly following any rule. © 2001 John Wiley & Sons, Inc. 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