Technical Report - In this work the authors investigate two hypotheses commonly assumed in Computer Vision and Computer Graphics for solvin In this work the authors investigate the relations between the colors of two pictures of a same scene taken under two different light sources. This is a crucial task in Computer Vision and Computer Graphics. The authors show that: (1) the von Kries model suffices for describing the color variation due to a Planckian illuminant change; (2) the Planck's law constraints the triplets of the von Kries coefficients to be points of a ruled surfaces parametrized by the photometric cues of the illuminants; (3) the von Kries coefficients are strongly related to the sensitivity functions of the device. Several experiments carried out on public image datasets are presented.
Planckian Illuminants and Von Kries Model
Lecca, Michela;Messelodi, Stefano
2010-01-01
Abstract
Technical Report - In this work the authors investigate two hypotheses commonly assumed in Computer Vision and Computer Graphics for solvin In this work the authors investigate the relations between the colors of two pictures of a same scene taken under two different light sources. This is a crucial task in Computer Vision and Computer Graphics. The authors show that: (1) the von Kries model suffices for describing the color variation due to a Planckian illuminant change; (2) the Planck's law constraints the triplets of the von Kries coefficients to be points of a ruled surfaces parametrized by the photometric cues of the illuminants; (3) the von Kries coefficients are strongly related to the sensitivity functions of the device. Several experiments carried out on public image datasets are presented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
