Comparison of Calibration Methods for Tristimulus Colorimeters
J L. Gardner
Uncertainties in source color measurements with a tristimulus colorimeter are estimated for calibration factors determined based on a known source spectral distribution or on accurate measurements of the spectral responsivities of the colorimeter channels. Application is to the NIST colorimeter and a CIE Illuminant A calibration. Detector-based calibration factors generally have lower uncertainties than source-based calibration factors. Uncertainties are also estimated for calculations of spectral mismatch factors. Where both spectral responsivities of the colorimeter channels and the spectral power distributions of the calibration and test sources are known, uncertainties are lowest if the colorimeter calibration factors are recalculated for the test source; this process also avoids correlations between the CIE Source A calibration factors and the spectral mismatch factors.
Comparison of Calibration Methods for Tristimulus Colorimeters, Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD
(Accessed February 25, 2024)