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A color coordinate system from a 13th century account of rainbows #MMPMID24695192
Smithson HE; Anderson PS; Dinkova-Bruun G; Fosbury RAE; Gasper GEM; Laven P; McLeish TCB; Panti C; Tanner B
J Opt Soc Am A Opt Image Sci Vis 2014[Apr]; 31 (4): A341-9 PMID24695192show ga
We present a new analysis of Robert Grosseteste?s account of color in his treatise De iride, On the Rainbow, dating from the early 13th century. The work explores color within the three-dimensional framework set out in Grosseteste?s De colore (see Smithson et al, 2012, A three-dimensional color space from the 13th century.? Journal of the Optical Society of America (A), 29 (2), A346-A352), but now links the axes of variation to observable properties of rainbows. We combine a modern understanding of the physics of rainbows and of human color perception to resolve the linguistic ambiguities of the medieval text and to interpret Grosseteste?s key terms.