Abstract
‘Standard Object Colour Spectra Database for Colour Reproduction Evaluation (SOCS)', which contains about 50,000 object color reflectances/transmittances, was published as a Japanese Industrial Standard Technical Report(JIS-TR) in 19981). To promote, widen and standardize usage of SOCS, we selected representative data sets, including both typical sets and difference sets. Typical set samples have average characteristics of whole data in an object group, and difference set samples have metameric characteristics to corresponding typical set samples, respectively. This paper describes concepts and purposes of the selection, as well as the selection algorithms. A total of 365 representative data samples(235 samples for typical sets and 130 samples for difference sets)were selected and evaluated whether they meet the purposes for the sets. The evaluation result showed that they are very useful as follows.(a)Color correction matrices can be determined using only typical sets so accurately as they are determined using whole data in the groups.(b)Easy evaluation of color reproduction quality for color sensors by a combinatorial use of typical and difference sets, when spectral sensitivity of color sensors is known.
