In order to perform quantitative evaluation of a camera colour measurement quality, two characterization approaches were performed and compared: measuring the spectral sensitivity of the R G B channels, and using a least square fitting of L*a*b* coordinates of a collection of reference samples.
Mohamed Ben Chouikha, Blandine Placais, Gaëlle Pouleau, Sylvie Sautot, Françoise Viénot, "Benefits and Drawbacks of two Methods for Characterizing Digital Cameras" in Proc. IS&T CGIV 2006 3rd European Conf. on Colour in Graphics, Imaging, and Vision, 2006, pp 185 - 188, https://doi.org/10.2352/CGIV.2006.3.1.art00037