Laure FAUCH, Ervin NIPPOLAINEN, Alexei A. KAMSHILIN, Markku HAUTA-KASARI¹, Jussi PARKKINEN¹, and Timo JÄÄSKELÄINEN¹

University of Kuopio, P.O. Box 1627, FIN-70211 Kuopio, Finland
¹University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland

(Received January 29, 2007; Accepted April 10, 2007)

Accurate color classification by vector subspace method was implemented by simple optical system including computer controlled set of light-emitting diodes and a photo-receiver operating in the integration regime. The technique is capable for fast and precise classification of color distribution within two-dimensional frame with high spatial resolution. The feasibility of the proposed system is shown by a test of four metameric colors, which were correctly distinguished.

Key words: color representation, tunable acousto-optic filter, light-emitting diode