Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/50040

TitleThe distribution of discernible colours in natural scenes
Author(s)Nascimento, Sérgio M. C.
Linhares, João M. M.
Pinto, Paulo Daniel Araújo
Foster, D. H.
Amano, K.
Issue date1-Aug-2008
PublisherPion Ltd.
JournalPerception
CitationNascimento, S. M., Linhares, J. M., Pinto, P. D., Foster, D. H., & Amano, K. (2008). The distribution of discernible colours in natural scenes. Perception ECVP abstract, 37, 84-84
Abstract(s)Although the total number of discernible colours in natural scenes has been estimated from physical data, the distribution of colours has received little attention. To address this issue, an analysis was made of hyperspectral images taken from a database of 50 urban and rural scenes. The colour volume of the database was computed by expressing each pixel of each image in CIELAB space. To derive the distribution of colours, the volume was segmented into just distinguishable sub-volumes, approximated by unit cubes, with each non-empty sub-volume assumed to represent one discernible colour and its pixel population the total number of times it occurs over the 50 scenes. It was found that the fraction of discernible colours expressed as a function of occurrence could be described by a negative power-law and that most discernible colours appeared only rarely. Thus, 70% of the total number of discernible colours constituted only about 3% of the pixels sampled, implying that most of the natural chromatic distribution fell within a small colour gamut
TypeAbstract
URIhttp://hdl.handle.net/1822/50040
ISSN0301-0066
Publisher versionhttp://journals.sagepub.com/toc/peca/37/1_suppl
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - OCV - Comunicações/Communications (with refereeing)

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