A novel approach to Colour Quality based on unique hues
نویسندگان
چکیده
ABSTRACT: A novel visual experiment for the analysis of the effect of different lights on the appearance of colours is presented. It could be the basis for the improvement of the Colour Rendering Index, it starts from the concept of unique hues and analyses the constancy or variations of unique hues under different real light sources. Analysed sources include incandescent lamp, a simple realization of D65 and white LEDs. The samples used in the experiments are three dimensional to reproduce more realistic conditions.
منابع مشابه
A Theory of Unique Hues and Colour Categories in the Human Colour Vision
A novel approach to assessing colour appearance is described. It is based on a new technique—partial hue-matching—which allows for measuring colour in terms of component hues objectively, without resorting to verbal definitions. The new method is believed to have a potential to be as exact as colorimetric techniques. In contrast to classical colour matching, which implies visual equivalence of ...
متن کاملEvidence for the existence of colour mechanisms producing unique hues as derived from a colour illusion based on spatio-chromatic interactions
When its spatial frequency is high enough, a grid of grey horizontal strips presented on a coloured background may change its neutral colour. It was found that some background colours induce a strong illusion and some no illusion at all. The effect of the background colour on the illusion was studied for the spatial frequencies of 0.5, 2.5, 4, and 8 c/deg. Thirty chromaticities (evenly distribu...
متن کاملThe cone inputs to the unique-hue mechanisms
Our aim was to characterise the chromatic mechanisms that yield the four unique hues: red, green, yellow and blue. We measured the null planes for all four unique hues and report the following two main results. (1) We confirm that three chromatic mechanisms are required to account for the four unique hues. These three chromatic mechanisms do not coincide with the chromatic tuning found in parvo...
متن کاملUnique Hue Data for Colour Appearance Models. Part III: Comparison with NCS Unique Hues
In this study, Swedish Natural Color System (NCS) unique hue data were used to evaluate the performance of unique hue predictions by the CIECAM02 colour appearance model. The colour appearance of 108 NCS unique hue stimuli was predicted using CIECAM02, and their distributions were represented in a CIECAM02 ac–bc chromatic diagram. The best-fitting line for each of the four unique hues was found...
متن کاملUnique hues: an old problem for a new generation
The practical success of the classical theories of colour vision, such as that of Young-Helmholtz when applied to the measurement and reproduction of colour stimuli, and that of Hering's in art and architecture, has overshadowed the fact that neither theory achieved its main goal, namely to explain colour qualities. Neither the three types of cone, nor the first opponent stages of neural proces...
متن کامل