physiologically motivated (see [15]) colour space corresponds to the deviation in illumination from typical daylight. By a process, the cluster is transformed so that its elongation will be along the achromatic axis. So we can ensure equal colour sensations under different lighting conditions (see 1st and 2nd figure below). The skin colour classification takes place within the RGB-colour-space ...

Researchers must assess similarities and differences in colour from an animal's eye view when investigating hypotheses in ecology, evolution and behaviour. Nervous systems generate colour perceptions by comparing the responses of different spectral classes of photoreceptor through colour opponent mechanisms, and the performance of these mechanisms is limited by photoreceptor noise. Accordingly,...

We introduce soft colour interactions as a novel mechanism to understand the observed events with large rapidity gaps in ep collisions at HERA. Colour exchanges between produced partons and colour-charges in the proton remnant modifies the colour structure for hadronization, such that colour singlet systems may appear well separated in rapidity. Our explicit model show characteristics of diffra...

Although it seems counter-intuitive, categorical colours do not exist as external physical entities but are very much the product of our brains. Our cortical machinery segments the world and associate objects to specific colour terms, which is not only convenient for communication but also increases the efficiency of visual processing by reducing the dimensionality of input scenes. Although the...

We consider a model of a discrete time “interacting particle system” on the integer line where infinitely many changes are allowed at each instance of time. We describe the model using chameleons of two different colours, viz ., red (R) and blue (B). At each instance of time each chameleon performs an independent but identical coin toss experiment with probability α to decide whether to change ...

This article presents a comparative study between different colour models (RGB, HSI and CIEL*a*b*) applied to a very large microscopic image analysis. Such analysis of different colour models is needed in order to carry out a successful detection and therefore a classification of different regions of interest (ROIs) within the image. This, in turn, allows both distinguishing possible ROIs and r...

statement of problem: the effect of mouth washes on discolouration of dental ceramics with different surface preparations is not well documented. objectives: this in-vitro study has been conducted to evaluate the effect of chlorhexidine (chx) mouth rinse on colour stability of overglazed (op), autoglazed, (ap) or polished porcelain (pop) specimens. materials and methods: the restorative materia...