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Proceedings Paper

Comprehensive comparison between different mathematical models for inter-instrument agreement of reflectance spectrophotometers
Author(s): Sidney Y.S. Chung; John H. Xin; K.M. Sin
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Paper Abstract

In color-related industry, reflectance spectrophotometers are one of the most popular equipment for evaluating the color quality and color difference. Currently, manufacturers claim that the measurement difference between models of spectrophotometer was lower than 0.1 CIELAB ΔE units. But in our investigation, the color difference values range from 0.5 to 0.8 CIE ΔE units, which implies that the correction models must be applied to correct such errors. In our investigation, two models were also developed, so call "Lab Model" and "R-Model". These two models only involve simple regression calculation and the results also showed significant improvement. A comprehensive comparison between those models and the previously reported models is made. The comparison involves the use of BCRA-NPL Series II titles as the calibration data and the testing is based on teh Color Curve Paper Samples.

Paper Details

Date Published: 6 June 2002
PDF: 5 pages
Proc. SPIE 4421, 9th Congress of the International Colour Association, (6 June 2002); doi: 10.1117/12.464698
Show Author Affiliations
Sidney Y.S. Chung, Hong Kong Polytechnic Univ. (China)
John H. Xin, Hong Kong Polytechnic Univ. (Hong Kong)
K.M. Sin, Hong Kong Polytechnic Univ. (China)


Published in SPIE Proceedings Vol. 4421:
9th Congress of the International Colour Association

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