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On the trichromatic and opponent-process theories: An article by E. Schrödinger How to reconcile two theories of color Translation and commentary by KEITH K. NIALL Department of Psychology, Queen's University, Kingston, Ontario K7L3N6, Canada Received 18 January 1988; revised 15 March 1988; accepted 17 March 1988 Abstract-A translation of Schrödinger's paper, 'On the relation of the tetrachromatic theory to the trichromatic theory' (1925), is accompanied by a commentary. Schrödinger applies a projective transform- ation to a standard chromaticity diagram, to demonstrate the common geometry of the chromaticity diagrams derived from the trichromatic and opponent-process theories of color vision. Students of physics are well aware of the contributions to science that have been made by Erwin Schr6dinger (1887-1961). His contributions to wave mechanics and statistical thermodynamics are basic to those fields (cf. Schr6dinger, 1928; Waldram, 1985). Schrodinger's contributions are fundamental to color theory as well. Transl- ations of two of Schrbdlnger's seminal papers on color theory are published in MacAdam (Schr6dinger 1920, 1926). These are substantial historical and theoretical contributions to color science. One of these articles defines the problem of the 'line element' for color space. Oddly, one of Schr6dinger's other Zurich papers has been largely unnoticed. This
Spatial Vision (continued as Seeing & Perceiving from 2010) – Brill
Published: Jan 1, 1988
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