Enhanced Model for Chromaticity Differences

  • Toni Kuparinen
  • Arto Kaarna
  • Pekka Toivanen
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2749)


We have developed a model to calculate chromaticity differences from surfaces defined from the MacAdam ellipses in CIE 1931 (x,y)-chromaticity diagram. The idea is to transform the MacAdam ellipses to circles on planes and to connect these planes to each other as two surfaces through interpolation. The distances along the surfaces are calculated by a method based on the Weighted Distance Transform On Curved Space (WDTOCS). The chromaticity difference is calculated by combining the distances on the basis of the ellipse parametrization. The surface model corrects the planar values in chromaticity difference calculation. Our method can be applied to any set of planar ellipses.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Toni Kuparinen
    • 1
  • Arto Kaarna
    • 1
  • Pekka Toivanen
    • 1
  1. 1.Department of Information TechnologyLappeenranta University of TechnologyLappeenrantaFinland

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