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1 November 1991 Performance of pyramidal phase-only filtering of infrared imagery
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Infrared imagery of 512 X 512 pixels was processed with 128 X 128 arrays by computer simulations of optical correlation. Pyramidal processing using binary phase-only filters was used to process an entire image in parallel at different resolutions. Morphological processing was used to create an image pyramid so that only binary processing was used. The descent policy (processing path to a different level of the pyramid) for optical processing was found to be simpler than that of template matching in digital image processing. Results showed that approximate indications of whether an object is present in a scene can be determined quickly. Further processing generally revealed more precise information. Furthermore, in-class objects present within an image but not exactly matching the filter did not necessarily produce more precise information upon further processing. The termination level of the processing technique is nontrivial and may not be the highest resolution level in some cases.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Samuel Peter Kozaitis and Robert Petrilak "Performance of pyramidal phase-only filtering of infrared imagery", Proc. SPIE 1564, Optical Information Processing Systems and Architectures III, (1 November 1991);

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