Download Colour Perception: Mind and the Physical World by Rainer Mausfeld, Dieter Heyer PDF

By Rainer Mausfeld, Dieter Heyer

Univ. of Kiel, Germany. presents an outline of the modern advancements in our figuring out of colours and of the connection among the 'mental' and the 'physical'. Discusses gentle and distinction model, human colour imaginative and prescient, the processing of chromatic info, the interplay of colour and movement, and extra. For researchers.

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Additional info for Colour Perception: Mind and the Physical World

Sample text

Then the remitted beams are essentially equal to the beam of the illuminant with the radiant power at certain wavelength regions selectively attenuated (Goethe’s notion of colours as ‘shadow-like’ entities [44,45]). In order to make this more precise we will define a new entity that should figure in colorimetry next to the concepts of ‘beam’ and ‘patch’. We will call it a ‘chip’, after the chips to be found in conventional colour atlases. ) are material things that you may indeed grasp with your hand.

One calls this the ‘dominant wavelength’ of any colour contained in the plane. By extending the planes beyond the achromatic axis we establish a relation between pairs of dominant wavelengths, conventionally these are called mutually ‘complementary’ wavelengths. In the chromaticity plane the achromatic beam is represented by an achromatic point, and the sheaf of planes by a fan of lines on this point. The dominant and complementary wavelengths are found as the intersections of the lines of the fan with the spectral locus and line of purples.

The reason is that the photoreceptors are essentially photon counters, whereas the photon energy is the major causal factor in the interaction of electromagnetic radiation with matter. Thus there are good biological reasons (that is the ‘ecological optics’) to prefer the latter representation. Additional structure: the achromatic beam When we circumnavigate the boundary of the cone of colours (avoiding the origin) we experience a continuous change of ‘hue’. Since the path is closed, the hues form a periodic linear sequence.

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