Illuminant Invariant Chromaticity Distribution Coding Using the Fourier Power Spectrum

Berens, J. and Finlayson, G. D. (2004) Illuminant Invariant Chromaticity Distribution Coding Using the Fourier Power Spectrum. In: CGIV 2004 -- Second European Conference on Color in Graphics, Imaging and Vision, 2004-04-01.

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We have previously shown that log-opponent chromaticity distribution histograms provide an effective and perceptually relevant method of coding the colour content of an image. In this space, constant object or scene colours are separated from the variable illumination colour. Variation in illuminant colour, known to cause indexing to fail, is modelled as a translation within the log-opponent chromaticity space coordinate. In effect, the distribution shape remains constant, but translates within the coordinate system as illumination colour varies. We show that the Fourier Power Spectrum (FPS) captures the distribution shape in the frequency domain, and provides accurate illuminant invariant image indexing performance. Furthermore, the FPS can be effectively compressed down to a very small (8 value) match feature vector without affecting indexing accuracy. Results for the FPS method show some improvement over those from our earlier work on mean-centred log-opponent chromaticity distribution histograms.

Item Type: Conference or Workshop Item (Paper)
Faculty \ School: Faculty of Science > School of Computing Sciences
UEA Research Groups: Faculty of Science > Research Groups > Interactive Graphics and Audio
Faculty of Science > Research Groups > Colour and Imaging Lab
Depositing User: Vishal Gautam
Date Deposited: 14 Jun 2011 18:19
Last Modified: 22 Apr 2023 02:46

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