There are currently five transformation matrices being considered for use in the linear chromatic-adaptation transform in a revision of the CIECAM97s color appearance model. Four of the matrices were developed independently for the purpose of transforming tristimulus values to spectrally
sharpened RGB responses. The fifth is the Hunt-Pointer-Estevez transform of CIE tristimulus values to normalized cone responsivities. RGB images were transformed between CIE illuminant D65 and CIE illuminant A white point using each of the matrices and results were examined visually. In addition,
pixel-wise Δ
Anthony J. Calabria, Mark D. Fairchild, "Herding CATs: A Comparison of Linear Chromatic-Adaptation Transforms for CIECAM97s" in Proc. IS&T 9th Color and Imaging Conf., 2001, pp 174 - 178, https://doi.org/10.2352/CIC.2001.9.1.art00032