Magnitude estimation for scaling saturation

摘要

Psychophysical experiments were carried out for describing colour appearance under 12 different sets of viewing conditions including variations of neutral backgrounds, sample sizes, textures, sample types and colour attributes. The results on saturation based upon 132 coloured cube samples are discussed here. It was found that observers can be trained to scale saturation with a great accuracy. There is little difference in the results for the white, grey and black backgrounds studied. Saturation is dependent upon lightness and colourfulness, i.e. an increase in saturation will increase colourfulness but with a reduction of lightness. It was also found that the saturation scale of CIECAM97s did not fit well to the visual results. An improved scale was developed.