Theoretical models of the colour vision network

An analytical description of the line element in the zone-fluctuation model of colour vision. Part 1: Basic concepts

A mathematical description is given of colour discrimination which rests on three assumptions: 1. (1) Colour processing occurs in a Helmholtz-type three receptor-zone, followed by a Hering-type neural-conversion-zone in which a luminance (L) and two antagonistic (R vs. G and Y vs. B) signals are formed. 2. (2) Colour discrimination is...

Fluctuation theory of colour discrimination of normal trichromats

The De Vries and Rose hypothesis concerning visual discrimination has been extended to the colour discrimination of normal trichromats. This hypothesis states that a luminance difference ΔB is just above threshold when ΔB just exceeds the statistical fluctuations in background luminance B, which are proportional to B 1 2. The colour difference...

A zone theory of colour vision

Arguments are put forward to explain the basic facts about color vision in the frame work of a zone theory, a combination of the Young-Helmholtz and the Hering theory. Data on wavelength discrimination in particular as a function of luminance, necessitate to assume separate mechanisms for red-green and for yellow-blue discrimination (Hering)....

On the mechanisms of colour vision

A study of normal and defective colour vision

MEASUREMENTS were made of saturation discrimination of normal and colour defective subjects with illuminant A as reference colour. The colorimeter used in the experiments was of a special design developed for easy use by untrained persons. The results for normals are not quite in agreement with the data of MacAdam. Different experimental...

Another colorimeter for studying colour vision