{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T05:24:40Z","timestamp":1767849880699,"version":"3.49.0"},"reference-count":19,"publisher":"Maximum Academic Press","issue":"3","license":[{"start":{"date-parts":[[2005,4,5]],"date-time":"2005-04-05T00:00:00Z","timestamp":1112659200000},"content-version":"unspecified","delay-in-days":339,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":["journals.cambridge.org"],"crossmark-restriction":true},"short-container-title":["Vis Neurosci"],"published-print":{"date-parts":[[2004,5]]},"abstract":"<jats:p>Relational color constancy refers to the constancy of the perceived \nrelations between the colors of surfaces of a scene under changes in \nthe spectral composition of the illuminant. Spatial ratios of cone \nexcitations provide a natural physical basis for this constancy, as, on \naverage, they are almost invariant under illuminant changes for large \ncollections of natural surfaces and illuminants. The aim of the present \nwork was to determine, computationally, for specific surfaces and \nilluminants, the constancy limits obtained by the application of a \nminimum-variance principle to cone-excitation ratios and to investigate \nits validity in predicting observers' surface-color judgments. \nCone excitations and their changes due to variations in the color of \nthe illuminant were estimated for colored surfaces in simulated \ntwo-dimensional scenes of colored papers and real three-dimensional \nscenes of solid colored objects. For various test surfaces, scenes, and \nilluminants, the estimated levels of relational color constancy \nmediated by cone-excitation ratios varied significantly with the test \nsurface and only with certain desaturated surfaces corresponded to \nideal matches. Observers' experimental matches were compared with \npredictions expressed in CIE 1976 (<jats:italic>u<\/jats:italic>\u2032,<jats:italic>v<\/jats:italic>\u2032) \nspace and were found to be generally consistent with minimum-variance \npredictions.<\/jats:p>","DOI":"10.1017\/s095252380421327x","type":"journal-article","created":{"date-parts":[[2007,6,12]],"date-time":"2007-06-12T14:35:59Z","timestamp":1181658959000},"page":"337-340","update-policy":"https:\/\/doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":13,"title":["Minimum-variance cone-excitation ratios and the limits of \nrelational color constancy"],"prefix":"10.48130","volume":"21","author":[{"given":"S\u00c9RGIO M.C.","family":"NASCIMENTO","sequence":"first","affiliation":[]},{"given":"VASCO M.N.","family":"de ALMEIDA","sequence":"additional","affiliation":[]},{"given":"PAULO T.","family":"FIADEIRO","sequence":"additional","affiliation":[]},{"given":"DAVID H.","family":"FOSTER","sequence":"additional","affiliation":[]}],"member":"27968","published-online":{"date-parts":[[2005,4,5]]},"reference":[{"key":"S095252380421327X_ref005","doi-asserted-by":"crossref","unstructured":"Craven, B.J. & Foster, D.H. 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