Trichromatic images of natural scenes contain information about the reflecting surfaces in those scenes. Colour is a very important source of information for identifying surfaces and making judgements about them. Judgements about surfaces in a scene by the formation provided by their colour can be done only if such colours remain stable under changes in the illumination. This approxmiate constancy of colours is not straightforward, as the spectra of the light reflected towards the eye can change considerably with the spectrum of the illummation. Therefore, the three photoreceptors in the eye respond differently to the different spectra reflected by the same surface under different ihuminants. Nevertheless, for a given scene, patterns of receptor responses under different illuminants are intrinsically mterrelated, and the Strength of these interrelations allow for the generation of approximately illuminantinvariant surface-colour codings. The aim of this thesis was to quantify objectively how much trichromatic information is potentially available to the eye and how much of it is actually retrieved for natural scenes under changes in illumination.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:496257 |
| Date | January 2009 |
| Creators | Marin-Franch, Ivan |
| Publisher | University of Manchester |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
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