Colour invariance at a pixel

Graham D. Finlayson, Steven D. Hordley, John A. Marchant, Christine M. Onyango

Research output: Contribution to conferencePaper


This paper addresses the question of what can be said about the colours in images that is independent of illumination. We make two main assumptions: Firstly, the illumination can be characterised as Planckian (a realistic assumption for most real scenes). Secondly, the camera behaves as if it were equipped with narrow band sensors (true for a large number of cameras). The resulting physics-based method results in a transformation of the original colour image to a grey-scale one which does not vary with illumination. We give results showing invariance under a range of illumination conditions.
Original languageEnglish
Publication statusPublished - Sep 2000
Event11th British Machine Vision Conference - University of Bristol, Bristol, United Kingdom
Duration: 11 Sep 200014 Sep 2000


Conference11th British Machine Vision Conference
Country/TerritoryUnited Kingdom

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