Gamut Clipping and Mapping based on Coloroid System

Laszlo Neumann, Attila Neumann
Gamut Clipping and Mapping based on Coloroid System
In Proceedings of Second European Conference on Colour in Graphics, Imaging and Vision, pages 548-555. 2004.
[ Gamut Clipping and Mapping]
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Abstract

The paper presents novel techniques based on the Coloroid color system which hitherto has not been applied to gamut mapping. The introduced methods described are hue preserving and use three gravity centers in a hue-dependent way. Two of the gravity centers are shifted toward the direction of ‘negative saturation’, and can be used for regions of bright and dark colors, while a third gravity center is used for saturated colors. After a short survey of gamut mapping an introduction to the Coloroid describes concisely its features and formulas. Then a simple color clipping rule is presented applicable to any rendering applications. A gamut mapping method will be defined mapping from a generic input image to an RGB display. Other variations of the method describe RGB-CYMK transformation and also cross-media mapping for known input and output gamut boundaries. The introduced methods apply hue and chroma dependent lightness compression. They can be applied in realistic computer graphics and digital photography as well as in printing technologies. They are straightforward to implement and have low computational costs.

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@inproceedings{Neum04GCM,
  title =      "Gamut Clipping and Mapping based on Coloroid System",
  author =     "Laszlo Neumann and Attila Neumann",
  year =       "2004",
  abstract =   "The paper presents novel techniques based on the Coloroid
               color system which hitherto has not been applied to gamut
               mapping. The introduced methods described are hue preserving
               and use three gravity centers in a hue-dependent way. Two of
               the gravity centers are shifted toward the direction of
               ‘negative saturation’, and can be used for regions
               of bright and dark colors, while a third gravity center is
               used for saturated colors.  After a short survey of gamut
               mapping an introduction to the Coloroid describes concisely
               its features and formulas. Then a simple color clipping rule
               is presented applicable to any rendering applications. A
               gamut mapping method will be defined mapping from a generic
               input image to an RGB display. Other variations of the
               method describe RGB-CYMK transformation and also cross-media
               mapping for known input and output gamut boundaries.  The
               introduced methods apply hue and chroma dependent lightness
               compression. They can be applied in realistic computer
               graphics and digital photography as well as in printing
               technologies. They are straightforward to implement and have
               low computational costs.",
  pages =      "548--555",
  booktitle =  "Proceedings of Second European Conference on Colour in
               Graphics, Imaging and Vision",
  keywords =   "Coloroid Color System, Gamut Clipping, Gamut Mapping, Human
               Perception",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/2004/Neum04GCM/",
}