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Content archived on 2022-12-23

Colour perception: psychophysics and psychology

Objective



The investigations within this joint research project will concentrate on colour contrast mechanisms in humans using a spherical model of colour discrimination.

The main hypothesis concerns the assumption that colours induced by contrast fit the spherical model colour discrimination. According to this model all perceived colours of different wavelength and intensity can be represented as points on the spherical surface of the four-dimensional hypersphere. Three spherical co-ordinates represent perceptual characteristics of colour such as hue, saturation and brightness, while the Cartesian co-ordinates describe the characteristics of neural mechanisms involved in colour discrimination.

The study will include psychophysical experiments and recording of bio-potentials. The psychophysical data will be summarized in a model which predicts colour contrast evoked by the test/background configuration. This model will describe both achromatic and chromatic colour contrast and will be evaluated with respect to the four-dimensional spherical model of colour coding.

The colour-dependent biopotentials will be used in experiments directed to reveal brain mechanisms of colour contrast. Each stage of experiments will be supplemented by a model representing quantitative aspects of contrast phenomena.

Call for proposal

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Funding Scheme

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Coordinator

Katholieke Universiteit Nijmegen
EU contribution
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Address
Montessorilaan 3
6500 HE Nijmegen
Netherlands

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Total cost
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Participants (2)