An optimisation study of colour measurements on digitised slides of painted works of art

Authors: Sotiropoulou S.¹; Chryssoulakis Y.²

Source: Coloration Technology, Volume 116, Number 1, 2000 , pp. 23-31(9)

Publisher: Society of Dyers and Colourists

Abstract:

This paper deals with the problem of the colorimetric fidelity of digitised colour slides of painted works of art. A six-matrix conversion model was derived that permitted the transformation of any RGB device-dependent measurement on digitised colour slides to XYZ CIE 1931 device-independent values. The model was calibrated against a reference colour chart. Eighty-one uniformly-painted colour samples were photographed together with a painting on a 4 × 5 inch colour slide that was digitised using a high resolution scanner. A 3 × 3 transformation matrix, of the corrected R, G and B values and the respective X, Y and Z tristimulus values provided by spectrophotometry, was calculated. The calculated matrix was then applied to a 13th century Byzantine fresco, captured on the same digitised slide, to transform the RGB measurements to XYZ CIE 1931 device-independent values which were then converted into the L* a* b* CIE 1976 colorimetric system.

Language: English

Document Type: Regular paper

Affiliations: 1: Dept of Chemical Engineering, National Technical University of Athens (NTUA), 9 Iroon Polytechniou Str., Zografou Campus, 15780 Athens, Greece 2: Diagnostic Centre for the Research and Study of Byzantine Hagiography, Holy Convent of the Annunciation, 63071 Ormylia-Chalkidiki, Greece.

Publication date: 2000-01-01

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• In this Subject: Chemical Engineering ,  Chemistry (General) ,  Inorganic Chemistry ,  Organic Chemistry ,  Physical & Theoretical Chemistry ,  Materials & Manufacturing ,  Technology
• By this author: Sotiropoulou S. ;  Chryssoulakis Y.

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