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Proceedings Paper

Real-time atmospheric imaging and processing with hybrid adaptive optics and hardware accelerated lucky-region fusion (LRF) algorithm
Author(s): Jony Jiang Liu; Gary W. Carhart; Leonid A. Beresnev; Mathieu Aubailly; Christopher R. Jackson; Garrett Ejzak; Fouad E. Kiamilev
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Paper Abstract

Atmospheric turbulences can significantly deteriorate the performance of long-range conventional imaging systems and create difficulties for target identification and recognition. Our in-house developed adaptive optics (AO) system, which contains high-performance deformable mirrors (DMs) and the fast stochastic parallel gradient decent (SPGD) control mechanism, allows effective compensation of such turbulence-induced wavefront aberrations and result in significant improvement on the image quality. In addition, we developed advanced digital synthetic imaging and processing technique, “lucky-region” fusion (LRF), to mitigate the image degradation over large field-of-view (FOV). The LRF algorithm extracts sharp regions from each image obtained from a series of short exposure frames and fuses them into a final improved image. We further implemented such algorithm into a VIRTEX-7 field programmable gate array (FPGA) and achieved real-time video processing. Experiments were performed by combining both AO and hardware implemented LRF processing technique over a near-horizontal 2.3km atmospheric propagation path. Our approach can also generate a universal real-time imaging and processing system with a general camera link input, a user controller interface, and a DVI video output.

Paper Details

Date Published: 17 September 2014
PDF: 9 pages
Proc. SPIE 9202, Photonics Applications for Aviation, Aerospace, Commercial, and Harsh Environments V, 920210 (17 September 2014); doi: 10.1117/12.2062914
Show Author Affiliations
Jony Jiang Liu, U.S. Army Research Lab. (United States)
Gary W. Carhart, U.S. Army Research Lab. (United States)
Leonid A. Beresnev, U.S. Army Research Lab. (United States)
Mathieu Aubailly, Univ. of Maryland, College Park (United States)
Christopher R. Jackson, Univ. of Delaware (United States)
Garrett Ejzak, Univ. of Delaware (United States)
Fouad E. Kiamilev, Univ. of Delaware (United States)

Published in SPIE Proceedings Vol. 9202:
Photonics Applications for Aviation, Aerospace, Commercial, and Harsh Environments V
Alex A. Kazemi; Bernard C. Kress; Edgar A. Mendoza, Editor(s)

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