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VISION EXPERIMENT ON PERCEPTION OF CORRELATED COLOR TEMPERATURE

Published

Author(s)

Yoshi Ohno, Hyeyoung Ha, Youngshin Kwak

Abstract

The correlated color temperature (CCT) is defined by the closest point on the Planckian locus from a light source on the (now obsolete) CIE 1960 (u, v) diagram, while the current standard uniform color space is the CIE 1976 (u', v') diagram. To re-visit the question whether using the (u', v') coordinate improves the correlation between the CCT values and perception, vision experiments were conducted with 12 subjects using a double-booth with non-haploscopic and haploscopic methods. The overall results show that the perception of test lights at CCT 3000 K and Duv -0.015 and 0.015 is closer to the CCT calculated based on CIE 1976 (u', v') coordinate. The perception of CCT at 5500 K with the same Duv shifts appears to be between CCTs based on the (u, v) coordinate and the (u', v') coordinate. It is suggested that the definition of CCT be re-examined for possibly using the CIE 1976 (u', v').
Proceedings Title
Proc. International Commission on Illumination 2017 Midterm Meeting
Conference Dates
October 23-25, 2017
Conference Location
Jeju, KR
Conference Title
International Commission on Illumination 2017 Midterm Meeting

Keywords

correlated color temperature, (u, v) diagram, (u’, v’) diagram, visual perception, white light

Citation

Ohno, Y. , Ha, H. and Kwak, Y. (2017), VISION EXPERIMENT ON PERCEPTION OF CORRELATED COLOR TEMPERATURE, Proc. International Commission on Illumination 2017 Midterm Meeting, Jeju, KR, [online], https://doi.org/10.25039/x44.2017, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=924251 (Accessed August 16, 2022)
Created November 14, 2017, Updated April 11, 2022