We present the implementation of a clutter-tolerant filter in a hybrid correlator system. Wiener filters were mapped with a complex encoding technique onto a smectic A* liquid-crystal spatial light modulator (SLM). The technique overcomes the problem of representing high-dynamic-range data on SLM's that have limited modulation capabilities. It also provides a compact image recognition system that is robust enough for many real-world applications. Experimental results are presented.
© 2001 Optical Society of America
Philip Birch, Sovira Tan, Rupert Young, Triantafillos Koukoulas, Frederic Claret-Tournier, David Budgett, and Chris Chatwin, "Experimental implementation of a Wiener filter in a hybrid digital--optical correlator," Opt. Lett. 26, 494-496 (2001)