[OPTICAL REVIEW Vol. 6, No. 1 (1999) 42-48]

Optical Color Pattern Recognition with High Discrimination Capability Using Binary Amplitude Phase-Only Filters

Abdelaziz ATTALEB, Esmail AHOUZI, Juan CAMPOS and Maria J. YZUEL*

Departamento de FÍsica, Universidad AutÓnoma de Barcelona, 08193 Bellaterra (Barcelona), Spain

(Received July 22, 1998; Accepted October 14, 1998)

The possibility of improving the discrimination capability (DC) in color pattern recognition is analyzed. In each channel, red, green and blue (R, G, B), a region of support is designed to improve the behavior of the Phase Only Filter matched to the corresponding component of the target. The procedure of optimization is based on the analytical expressions which give the DC in R, G, B channels, for real valued input scenes. Computer simulation results are presented and discussed.

Key words : optical correlation, phase only filter, region of support, discrimination capability, color pattern recognition