Correlation plane integration of time-sequenced binary phase-only filter responses

Bret F. Draayer; Thomas R. Walsh; Michael K. Giles

doi:10.1117/12.21318

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1 September 1990 Correlation plane integration of time-sequenced binary phase-only filter responses

Bret F. Draayer; Thomas R. Walsh; Michael K. Giles

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Proceedings Volume 1297, Hybrid Image and Signal Processing II; (1990) https://doi.org/10.1117/12.21318
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

Abstract

With the advent of high speed spatial light modulators, it is possible to write binary phase-only filters (BPOFs) faster than standard video rates. However, an optical correlation system which uses a camera operating at standard video rates to capture output correlation responses is limited to a maximum filter rate of 60 Hertz. This paper examines the use of a charge injection device (CID) camera to speed up the processing time of a BPOF-based rotation-invariant optical correlation system. Having integrating capabilities, the CID camera can integrate several output correlation plane responses during the frame time of the camera. In this paper, the performance of an integrating correlator is presented. The influence of factors such as the input image noise density, the number of integrated correlation responses, and the size of ternary low-frequency blocks on correlation responses are explored.

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Bret F. Draayer, Thomas R. Walsh, and Michael K. Giles "Correlation plane integration of time-sequenced binary phase-only filter responses", Proc. SPIE 1297, Hybrid Image and Signal Processing II, (1 September 1990); https://doi.org/10.1117/12.21318

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KEYWORDS

Filtering (signal processing)

Image filtering

Cameras

Image processing

Signal processing

Optical filters

Phase only filters

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