This study investigates the distortion of visual colour harmony impression in case of different types of artificial changes among the perceptual attributes of test samples. A set of visual experiments were carried out to investigate the observer's colour harmony impression as a function of artificial distortions. The visual colour harmony impression of a colour combination appearing harmonious under a reference illuminant might decrease if the combination of samples is illuminated by different test light sources, especially RGB LED clusters. A new quantity, the so called Harmony Distortion Index (HDI) is defined to describe the harmony distortion property of light sources.
Ferenc Szabó, László Antos, Peter Bodrogi, János Schanda, "Experimental Investigation of Distortion of Colour Harmony: A Harmony Distortion Index" in Proc. IS&T CGIV 2008/MCS'08 4th European Conf. on Colour in Graphics, Imaging, and Vision 10th Int'l Symp. on Multispectral Colour Science, 2008, pp 16 - 19, https://doi.org/10.2352/CGIV.2008.4.1.art00004