Various methods for quantifying gloss are described including psychophysical scaling, spectro-photometric measurement, and the use of a novel system based on digital imaging. Eighty-four samples covering a wide range of colour gamut and gloss level were assessed for gloss by a number of observers using a magnitude estimation method. Measurements made using two gloss-meters agreed only reasonably well with the visual results. A new measure, based on the difference between the CIE Y tristimulus values of the same sample, measured using a sphere-based spectrophotometer with specular included and excluded geometries, gave excellent agreement to the visual results. An imaging-based technique was established that used a distance profile method to give very good predictions of these visual results.
W. Ji, M. R. Luo, C. Li, G. Cui, M.R. Pointer, "A New Method for Assessing Gloss Based on Digital Imaging" in Proc. IS&T CGIV 2004 Second European Conf. on Colour in Graphics, Imaging, and Vision, 2004, pp 298 - 302, https://doi.org/10.2352/CGIV.2004.2.1.art00059