Efficient techniques to implement correlation filters on fast SLMs

Bertrand Noharet; Henrik Sjoeberg; Thomas Buret

doi:10.1117/12.386897

24 May 2000 Efficient techniques to implement correlation filters on fast SLMs

Bertrand Noharet, Henrik Sjoeberg, Thomas Buret

Proceedings Volume 4089, Optics in Computing 2000; (2000) https://doi.org/10.1117/12.386897
Event: 2000 International Topical Meeting on Optics in Computing (OC2000), 2000, Quebec City, Canada

Abstract

We propose a brief overview of different techniques to implement complex-valued filters on binary spatial light modulators (SLMs), including encoding techniques at both pixel- and cell- (i.e. group of pixels) levels. We show that group-oriented methods offer extended coding domains, at the expense of a reduced space bandwidth product and spurious noise in the correlation plane. We propose the concept of a time multiplexing technique that combines at the pixel level the pseudo-random encoding method with the minimum Euclidean distance approach. This pixel-oriented method offers the advantage to keep the full space bandwidth of SLMs, and the possibility to very efficiently encode ternary filters (-1, 0, +1) on binary phase (-1, +1) SLMs. Tested on a sequence of images acquired with an IR sensor in a tracking scenario (1 target), encoded ternary filters have offered superior performance in terms of peak-to-clutter ratio than classical BPOF (+45% in the simulation, +35% in the first optical experiments).

Citation Download Citation

Bertrand Noharet, Henrik Sjoeberg, and Thomas Buret "Efficient techniques to implement correlation filters on fast SLMs", Proc. SPIE 4089, Optics in Computing 2000, (24 May 2000); https://doi.org/10.1117/12.386897

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