2 March 1989 Quantitative Luminance And Colour Representation With CRT Displays
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Proceedings Volume 1027, Image Processing II; (1989) https://doi.org/10.1117/12.950268
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany
Abstract
Colour displays in image processing admit grey scales as well as colour scales for the visual representation of image information. Pseudocolours can be used to enhance the discriminability of different parts of the image. Luminance scales, on the other hand, are preferred for representing fine detail as human colour vision is limited to relatively low spatial frequencies. In the present paper, the generation of quantitative luminance and colour scales with CRT displays is discussed. This includes the colour characteristics of CRTs as well as a recapitulation of the CIE 1931 (X, Y, Z) tristimulus colorimetry system. The CIE 1976 UCS diagram (u', v') is used as an approximation to a perceptually uniform representation of chromaticity. On this basis, it is shown how, for each pixel, luminance and colour (hue) can be chosen independently. In order to add colour as a further visual dimension to greyscale images, a set of equiluminant hues is proposed for each luminance level. The hues are chosen from equidistant steps around a circle in the (u', v') chromaticity diagram. This choice of colours is particularly suitable for the visual representation of a cyclic quantity like phase angle.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hans Brettel, Hans Brettel, "Quantitative Luminance And Colour Representation With CRT Displays", Proc. SPIE 1027, Image Processing II, (2 March 1989); doi: 10.1117/12.950268; https://doi.org/10.1117/12.950268
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