Real-time atmospheric imaging and processing with hybrid adaptive optics and hardware accelerated lucky-region fusion (LRF) algorithm

Jony Jiang Liu; Gary W. Carhart; Leonid A. Beresnev; Mathieu Aubailly; Christopher R. Jackson; Garrett Ejzak; Fouad E. Kiamilev

doi:10.1117/12.2062914

17 September 2014 Real-time atmospheric imaging and processing with hybrid adaptive optics and hardware accelerated lucky-region fusion (LRF) algorithm

Jony Jiang Liu, Gary W. Carhart, Leonid A. Beresnev, Mathieu Aubailly, Christopher R. Jackson, Garrett Ejzak, Fouad E. Kiamilev

Author Affiliations +

Proceedings Volume 9202, Photonics Applications for Aviation, Aerospace, Commercial, and Harsh Environments V; 920210 (2014) https://doi.org/10.1117/12.2062914
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

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.

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Jony Jiang Liu, Jony Jiang Liu, Gary W. Carhart, Gary W. Carhart, Leonid A. Beresnev, Leonid A. Beresnev, Mathieu Aubailly, Mathieu Aubailly, Christopher R. Jackson, Christopher R. Jackson, Garrett Ejzak, Garrett Ejzak, Fouad E. Kiamilev, Fouad E. Kiamilev, } "Real-time atmospheric imaging and processing with hybrid adaptive optics and hardware accelerated lucky-region fusion (LRF) algorithm", Proc. SPIE 9202, Photonics Applications for Aviation, Aerospace, Commercial, and Harsh Environments V, 920210 (17 September 2014); doi: 10.1117/12.2062914; https://doi.org/10.1117/12.2062914

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