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Recovery of spectral sensitivity functions from a colour chart image under unknown spectrally smooth illumination
conference contribution
posted on 2014-01-01, 00:00 authored by Cong Phuoc Huynh, Antonio Robles-KellyAntonio Robles-KellyThis paper proposes a method to approximate the camera spectral sensitivity functions from a single colour image of a colour chart under an unknown illumination spectrum. Here we assume that the scene illumination has a smooth spectral variation. Although the original problem is rather ill-posed, we reformulate it as a well-posed optimisation one by introducing several constraints. The first constraint concerns with the smoothness of the illuminant power spectrum. The second one is based on the fact that the spectral sensitivity function of a digital camera should be constrained to a linear subspace according to Luther condition. The third constraint limits the influence of bands with low signal-to-noise ratios. By introducing these constraints, we can solve the problem in a coordinate-descent optimisation manner. We validate our method using data acquired from over 40 commercial camera models and compare with an alternative in the literature. We also demonstrate the utility of the estimated colour matching functions for colour simulation and colour transfer.
History
Event
IEEE Computer Society. Conference (22nd : 2014 : Stockholm, Sweden)Series
IEEE Computer Society ConferencePagination
708 - 713Publisher
Institute of Electrical and Electronics EngineersLocation
Stockholm, SwedenPlace of publication
Piscataway, N.J.Publisher DOI
Start date
2014-08-24End date
2014-08-28ISBN-13
978-1-4799-5209-0Language
engPublication classification
E1.1 Full written paper - refereedCopyright notice
2014, IEEEEditor/Contributor(s)
[Unknown]Title of proceedings
ICPR 2014 : Proceedings of the 2014 22nd International Conference on Pattern RecognitionUsage metrics
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