3 February 2011 Colour processing in Runge space
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Abstract
We do colour image processing in an RGB-derived spherical space with colour attributes given by hue, colourfulness (as opposed to grayness and somewhat different from saturation) and lightness; we call it Runge space. This spherical space is as intuitive as more common spaces of the type hue-saturation-luminance (called here η,Ε,Λ spaces), yet it avoids the continuity problems of the transformation (R, G,B) → (η,Ε,Λ) that result from normalizing the saturation by the luminance, or of having a geometrically nonhomogeneous space, when the saturation is left un-normalized. We give Matlab routines for the conversions between colour spaces RGB and Runge, and present applications of colour modification in Runge space.
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Alfredo Restrepo, "Colour processing in Runge space", Proc. SPIE 7870, Image Processing: Algorithms and Systems IX, 78700P (3 February 2011); doi: 10.1117/12.876641; https://doi.org/10.1117/12.876641
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