Analysis of chromatic contrast detection based on colorimetry

In contrast to luminance contrast detection, the characteristics of human chromatic contrast detection (contrast detection based on changes in chromatic distribution over space) are studied. Based on a detailed analysis of previous works, the fundamental colorimetry principle to analyse the luminance, dominant wavelength and colorimetric purity variance of the red-green and yellow-blue gratings is employed. Then a theory for color contrast detection is presented, which indicates that the isoluminant contrast sensitivity function can similarly be described by the luminance contrast, dominant wavelength, and colorimetric purity. Thus some part of the chromatic vision experimental characteristics can be explained. Furthermore, this three chromatic contrast provides a possible way for color image evaluation.