Previous attempts to predict chromatic-adaptation correspondence have led to a sharpening dilemma—i.e., Von Kries primaries are chosen that do not include in the positive octant all the realizable (x,y) chromaticities. This leads to paradoxical adaptation predictions for the colors that have negative Von Kries coordinates. A solution is proposed here that expresses the asymmetric-matching relation of chromatic adaptation as the product of two matrix transformations, given source illuminant 1 and destination illuminant 2: from source tristimulus values via adaptation matrix 1 to the adapted state coordinates, and from the adapted state via the inverse of adaptation matrix 2 to the destination illuminant tristimulus values. To avoid the sharpening instability, the entire spectrum locus must lie within the positive octant of the adapted state tristimulus space.

Chromatic Adaptation by Illuminant Matrix Products: An Alternative to Sharpened Von Kries Primaries / M., Brill; Oleari, Claudio. - In: COLOR RESEARCH AND APPLICATION. - ISSN 0361-2317. - 39:3(2014), pp. 275-278. [10.1002/col.21799]

Chromatic Adaptation by Illuminant Matrix Products: An Alternative to Sharpened Von Kries Primaries.

OLEARI, Claudio
2014-01-01

Abstract

Previous attempts to predict chromatic-adaptation correspondence have led to a sharpening dilemma—i.e., Von Kries primaries are chosen that do not include in the positive octant all the realizable (x,y) chromaticities. This leads to paradoxical adaptation predictions for the colors that have negative Von Kries coordinates. A solution is proposed here that expresses the asymmetric-matching relation of chromatic adaptation as the product of two matrix transformations, given source illuminant 1 and destination illuminant 2: from source tristimulus values via adaptation matrix 1 to the adapted state coordinates, and from the adapted state via the inverse of adaptation matrix 2 to the destination illuminant tristimulus values. To avoid the sharpening instability, the entire spectrum locus must lie within the positive octant of the adapted state tristimulus space.
2014
Chromatic Adaptation by Illuminant Matrix Products: An Alternative to Sharpened Von Kries Primaries / M., Brill; Oleari, Claudio. - In: COLOR RESEARCH AND APPLICATION. - ISSN 0361-2317. - 39:3(2014), pp. 275-278. [10.1002/col.21799]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2739903
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 4
social impact