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Abstract

An experiment was carried out to study colour discrimination on a display to simulate six different white light sources. Each centre includes 20 pairs of illuminant mode colours, which were assessed by 20 observers using the ratio method against a dark background. The results were used to test various models including the xy, uv, u′v′ chromaticity diagrams; the CIELUV, CIELAB and CAM02-UCS uniform colour spaces and the CIEDE2000 colour-difference formula. The results showed that the models developed from illuminant mode colours such as u′v′ and CIELUV predicted the results much more accurately than those developed from surface mode colours such as CIEDE2000 and CAM02-UCS. The present results lead us to propose the use of Δu′v′ to set tolerances for all white light sources along the blackbody locus.

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Colour difference evaluation for white light sources

Abstract

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