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Project

Colour appearance modelling for self-luminous colours.

The assessment of the quality and comfort of lighting requires a good understanding of the correlation between the optical properties of the stimuli, such as luminance, and their corresponding perceptual attributes such as brightness, hue, colourfulness, lightness, chroma and saturation. To facilitate this, colour appearance models have been developed that simulate many of the physiological processes that take place in the human visual system. The colour of objects originates from the interaction between a light source and the physical properties of the object. Object colours (or surface colours) belong to the category of so-called related colours because they are perceived within the context of the colour of the illuminant. For these stimuli, a colour appearance model was developed in 2002 which has been widely accepted by the international community. It has been applied in printing and display technology to reproduce the correct colour appearance of images under different viewing conditions. However, there is at present no agreed model for the evaluation of self-luminous stimuli, such as light sources, seen against an independent luminous background. This situation however, frequently occurs in everyday situations such as the perception of self-luminous panels and walls using LEDs and the perception of traffic signals and advertisements viewed both by day and by night. The aim of this project is to gather physical and visual data through measurements and observer assessments respectively. From these data, an improved or new colour appearance model will be developed which will increase our understanding of the mechanisms of perception of light sources seen again other light. In the long term, this model will provide an interesting tool to describe the visual experience of the total lit environment.
Date:1 Oct 2011 →  30 Jun 2014
Keywords:Self-luminous stimuli, Lighting, Light sources, Colour appearance model
Disciplines:Applied mathematics in specific fields, Materials science and engineering, Architectural engineering, Architecture, Interior architecture, Architectural design, Art studies and sciences, Classical physics, Optical physics