Color opponency and scale uniformity in the OSA-UCS system: the geometrical structure

Claudio Oleari

doi:10.1117/12.464590

6 June 2002 Color opponency and scale uniformity in the OSA-UCS system: the geometrical structure

Claudio Oleari

Proceedings Volume 4421, 9th Congress of the International Colour Association; (2002) https://doi.org/10.1117/12.464590
Event: 9th Congress of the International Color Association, 2001, Rochester, NY, United States

Abstract

Two different transformations between the (X₁₀, Y₁₀, Z₁₀) coordinates and the (L_OSA, g, j) ones of the Uniform Color System of the Optical Society of America (OSA- UCS) are given related to two possible different geometrical structures. Both transformations are logarithmic functions obtained by integration of Weber fractions of ratios of suitable color stimuli. The first structure is related to the color opponency proper of the (g, j) coordinates of the OSA-UCS) system and the second one to a mixing of the (g, j) coordinates. The second transformation has a simpler and highly symmetrical structure, and the regularity of the OSA- UCS lattice is higher.

Citation Download Citation

Claudio Oleari "Color opponency and scale uniformity in the OSA-UCS system: the geometrical structure", Proc. SPIE 4421, 9th Congress of the International Colour Association, (6 June 2002); https://doi.org/10.1117/12.464590

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