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|Title:||Chromatic diversity of natural scenes|
|Author(s):||Linhares, João M. M.|
Nascimento, Sérgio M. C.
Foster, D. H.
|Citation:||Linhares, J. M. M., Nascimento, S. M. C., Foster, D. H., & Amano, K. (2004). Chromatic diversity of natural scenes. Perception ECVP abstract, 34, 65|
|Abstract(s):||The number of discriminable colours is often assumed to be of the order of several million but the extent of detectable chromatic diversity present in individual natural scenes is an open question. The aim of this work was to estimate the number of discriminable colours seen in natural scenes. Hyperspectral data were obtained from a set of natural scenes over the range 400-720 nm at 10 nm intervals (Nascimento et al, 2002 Journal of the Optical Society of America A 19 1484 - 1490) and the representation of each scene in CIELAB space computed for all pixels of the image. The number of discriminable colours was estimated by counting the number of unit volumes in the three-dimensional volume defined by the scene when represented in CIELAB space. It was found that the number of discriminable colours estimated in the same scene could vary by one order of magnitude from scene to scene but rarely exceeded 105, indicating a limited chromatic diversity|
|Access:||Restricted access (UMinho)|
|Appears in Collections:||CDF - OCV - Comunicações/Communications (with refereeing)|
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