25 October 1993 Spatial-spectral optical pattern recognition using an acousto-optic tunable filter preprocessor
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Abstract
A conventional optical pattern recognition system such as the optical correlator is based on template matching between the input target and the filter. However, automatic target recognition, in a heavily camouflaged environment, requires additional spectral information to enable effective target discrimination. In this paper, an innovative spatial-spectral pattern recognition system is introduced. An acousto-optic tunable filter (AOTF) imaging spectrometer is used as the spatial-spectral preprocessor to enhance the camouflaged target image against its background. A cascaded correlator is then used for target recognition and tracking. An overview of the AOTF imaging spectrometer developed at JPL is provided. Experimental demonstrations of camouflaged target recognition from a foliage background are also provided.
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Tien-Hsin Chao, Tien-Hsin Chao, George F. Reyes, George F. Reyes, Eric R. Hegblom, Eric R. Hegblom, Li-Jen Cheng, Li-Jen Cheng, } "Spatial-spectral optical pattern recognition using an acousto-optic tunable filter preprocessor", Proc. SPIE 1959, Optical Pattern Recognition IV, (25 October 1993); doi: 10.1117/12.160312; https://doi.org/10.1117/12.160312
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