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A study in black: The cielab and cieluv L * function for very low values of Y
Author(s) -
Stenius Åke Sson
Publication year - 1978
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/col.5080030305
Subject(s) - mathematics , value (mathematics) , lightness , point (geometry) , metric (unit) , function (biology) , transfer (computing) , statistics , mathematical analysis , geometry , computer science , artificial intelligence , economics , operations management , evolutionary biology , parallel computing , biology
Four approximations to the CIELAB and CIELUV metric lightness function L * for values of Y < 1% have been examined. It is shown that the requirement of equality in both value and first derivative at the point of transfer results in considerably poorer fit to the Munsell Renotation Value function than approximations that do not demand continuity at the point of transfer.