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How do Major Color-Difference Formulae Perform in the High Chroma Blue Region?

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The objectives of this work were to develop a comprehensive visual dataset, NCSU-B2, around the CIE high chroma blue color centre and to use the new dataset as well as the low chroma blue dataset, NCUS-B1, to test the performance of the major color difference formulae in this region of color space using the standardized residual sum of squares (STRESS) index, correlation coefficient (r) and Spearman Rank coefficient (ρ) as performance metrics. The visual differences between the 65 samples and the color center were assessed by 16 observers under highly controlled viewing and illuminaiton conditions, using AATCC Gray Scale for Color Change, in three separate sittings and a total of 3120 assessments were obtained. The results showed that CIEDE2000 exhibited relatively better performance for the NCSU-B2 dataset in comparison to other equations examined. However, none of the tested equations gave a satisfactorily low STRESS value, or high correlation coefficient (r) and Spearman Rank coefficient (ρ) values. For the combined blue datasets (NCSU-B1 and B2), CAM02-UCS, CAM02-SCD, DIN99d and CIEDE2000 showed the best performance.
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Document Type: Research Article

Publication date: January 1, 2012

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  • CIC is the premier annual technical gathering for scientists, technologists, and engineers working in the areas of color science and systems, and their application to color imaging. Participants represent disciplines ranging from psychophysics, optical physics, image processing, color science to graphic arts, systems engineering, and hardware and software development. While a broad mix of professional interests is the hallmark of these conferences, the focus is color. CICs traditionally offer two days of short courses followed by three days of technical sessions that include three keynotes, an evening lecture, a vibrant interactive (poster) papers session, and workshops. An endearing symbol of the meeting is the Cactus Award, given each year to the author(s) of the best interactive paper; there are also Best Paper and Best Student Paper awards.

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