The present study considers a fuzzy color system in which triangular pyramid-like membership functions are constructed on the RGB color triangle. This system can process a fuzzy input to an RGB system and output the center of gravity of three weights associated with respective grades. Triangular pyramid-like membership functions are applied to the RGB color triangle relationship. By treating three membership functions of redness, greenness, and blueness on the RGB color triangle, a target color can be easily obtained as the center of gravity of the output fuzzy set. In the present paper, the differences among fuzzy input, inference output, and chromaticity are described, and the relationship between inference outputs for crisp inputs and inference outputs for fuzzy inputs on the chromaticity diagram are shown for colors that have circular or elliptical vagueness areas.


Membership Function Graphical Plane Triangular Membership Function Fuzzy Input Chromaticity Diagram 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Naotoshi Sugano
    • 1
  1. 1.Department of Intelligent Information SystemsTamagawa UniversityTokyoJapan

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