Modified phase-encoded fringe-adjusted joint transform correlation for multiple target detection

Mohammed R. Haider; Mohammed Nazrul Islam; Mohammad S. Alam; Jesmin Khan

doi:10.1117/12.548065

12 April 2004 Modified phase-encoded fringe-adjusted joint transform correlation for multiple target detection

Mohammed R. Haider, Mohammed Nazrul Islam, Mohammad S. Alam, Jesmin Khan

Proceedings Volume 5437, Optical Pattern Recognition XV; (2004) https://doi.org/10.1117/12.548065
Event: Defense and Security, 2004, Orlando, Florida, United States

Abstract

A modified phase-encoded fringe-adjusted joint transform correlation technique is proposed for multiple target detection, where two joint power spectrums (JPS) are formulated utilizing a random phase mask and phase shifted random phase mask to the reference image separately. The final JPS is the difference between the phase encoded and shifted phase encoded JPS which is multiplied by the phase mask before applying the inverse Fourier transform to yield the correlation output. This technique ensures better utilization of the input/output plane space bandwidth product by yielding one delta function like correlation peak for each desired target object and no peak for non-target objects. The proposed technique can effectively detect any number of targets from noise free or noisy input scenes without changing the system parameters and without any degradation of performance. Computer simulation results verify the performance of the proposed technique.

Citation Download Citation

Mohammed R. Haider, Mohammed Nazrul Islam, Mohammad S. Alam, and Jesmin Khan "Modified phase-encoded fringe-adjusted joint transform correlation for multiple target detection", Proc. SPIE 5437, Optical Pattern Recognition XV, (12 April 2004); https://doi.org/10.1117/12.548065

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KEYWORDS

Target detection

Fourier transforms

Phase shifts

Joint transforms

Optical filters

Optical correlators

Spatial light modulators

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