RGB Colors and Ecological Optics

Object color space is highly structured due to optical constraints (radiant power non-negative, reflectance factors between zero and unity) ecological context (daylight illuminant). In this setting trichromacy induces a natural geometry through unique spectral tripartition. Different from null-context colorimetry, one gains two desirable relations: The colorimetric coordinates are coarse-grained there direct link experiences, since RGB–coordinates provide ostensive definitions. framework allows deal with subtractive mixture, source variation, effects of metamerism relations scenes image data in unified, manner. contexts, colors effectively object properties. formal linear algebra convex geometry. Applications human biology, computer graphics, design, etc., immediate.