Determination of uncertainty in spectrophotometric surface color measurement

Andrew R. Hanson; Peter J. Clarke

doi:10.1117/12.464750

6 June 2002 Determination of uncertainty in spectrophotometric surface color measurement

Andrew R. Hanson, Peter J. Clarke

Proceedings Volume 4421, 9th Congress of the International Colour Association; (2002) https://doi.org/10.1117/12.464750
Event: 9th Congress of the International Color Association, 2001, Rochester, NY, United States

Abstract

This paper reports on work undertaken by nine European laboratories as part of a European Commission funded research project. The project's goal was to improve harmonisation of international colorimetric scales. One objective of the exercise was to devise a means of expressing total uncertainty in color measurement. When measuring color (or indeed any physical quantity), as assessment of the uncertainty of the result is as important as the value itself. This fact, long recognized in physics, is increasingly important to any quality assured organization that relies on measurements. The approach described first determines values of the sources of spectrophotometric uncertainty, and uses a simple model to combine these into total colorimetric uncertainties. The model has been used to determine uncertainties for the follow color data: x,y, T, u', v', L*, a* and b* for the CIE 10° Standard Observer and the CIE Standard Illiminant D₆₅ for three geometries: sepcular included, specular excluded and 0°/45°. The method is used routinely at NPL in its UKAS accredited calibration services.

Citation Download Citation

Andrew R. Hanson and Peter J. Clarke "Determination of uncertainty in spectrophotometric surface color measurement", Proc. SPIE 4421, 9th Congress of the International Colour Association, (6 June 2002); https://doi.org/10.1117/12.464750

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