Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/49997

TitleChromatic diversity index : an approach based on natural scenes
Author(s)Linhares, João M. M.
Pinto, Paulo Filipe Salgado
Nascimento, Sérgio M. C.
Issue date30-Nov-2010
PublisherSociety for Imaging Science and Technology
Abstract(s)Common descriptors of light quality fail to predict the chromatic diversity produced by the same illuminant in different contexts such as images of natural scenes. The aim of this paper was to introduce a new index, capable of predicting illuminant-induced variations in the chromatic diversity off natural scenes. The spectral reflectance of each pixel of 50 images of natural scenes obtained using a hyperspectral imaging and the spectral reflectance of 1264 Munsell surfaces were converted into the CIELAB color space for each of the 55 illuminants and 5 light sources. The CIELAB volume was estimated by the convex hull method. The number of discernible colors was estimated by segmenting the CIELAB color volume into unitary cubes and by counting the number of non-empty cubes. High correlation was found between the CIELAB volume occupied by the Munsell surfaces, the number of discernible colors and C1LEAB color volume of the colors of natural scenes. These results seem to indicate that a new illuminant chromatic diversity index based on natural scenes could be defined using the CIELAB volume of the Munsell surfaces.
TypeConference paper
URIhttp://hdl.handle.net/1822/49997
ISBN9781617388897
Publisher versionhttp://ist.publisher.ingentaconnect.com/content/ist/cgiv/2010/00002010/00000001
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - OCV - Comunicações/Communications (with refereeing)

Files in This Item:
File Description SizeFormat 
s1-ln761989895844769-1939656818Hwf1504197450IdV3065815417619898PDF_HI0001.pdf
  Restricted access
876,37 kBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID