Abstract

We introduce a new, to our knowledge, design for a Wiener-like correlation filter, which consists of cascading a phase-only filter (POF) with a photorefractive Wiener-like filter. Its performance is compared with that of the POF and the Wiener correlation filter (WCF). Correlation results show that for intermediate and higher levels of noise this correlation filter has a peak-to-noise ratio that is larger than that of either the POF or the WCF while still preserving a correlation peak that is almost as high as that of the POF.

© 2000 Optical Society of America

Performance measures for correlation filters

B. V. K. Vijaya Kumar and L. Hassebrook
Appl. Opt. 29(20) 2997-3006 (1990)

Noise and speckle reduction in synthetic aperture radar imagery by nonparametric Wiener filtering

Robert S. Caprari, Alvin S. Goh, and Emily K. Moffatt
Appl. Opt. 39(35) 6633-6640 (2000)

Analysis of spatial light modulator contrast ratios and optical correlation

Peter D. Gianino, Charles L. Woods, and Joseph L. Horner
Appl. Opt. 34(29) 6682-6694 (1995)

Gray-level computer-generated hologram filters for multiple-object correlation

C. Iemmi, S. Ledesma, J. Campos, and M. Villarreal
Appl. Opt. 39(8) 1233-1240 (2000)

Experimental implementation of a Wiener filter in a hybrid digital–optical correlator

Philip Birch, Sovira Tan, Rupert Young, Triantafillos Koukoulas, Frederic Claret-Tournier, David Budgett, and Chris Chatwin
Opt. Lett. 26(8) 494-496 (2001)