Astronomical image restoration through atmosphere turbulence by lucky imaging

Shixue Zhang; Yuanhao Wu; Jinyu Zhao; Jianli Wang

doi:10.1117/12.896183

8 July 2011 Astronomical image restoration through atmosphere turbulence by lucky imaging

Shixue Zhang, Yuanhao Wu, Jinyu Zhao, Jianli Wang

Proceedings Volume 8009, Third International Conference on Digital Image Processing (ICDIP 2011); 80090B (2011) https://doi.org/10.1117/12.896183
Event: 3rd International Conference on Digital Image Processing, 2011, Chengdu, China

Abstract

In this paper, we develop a lucky imaging system to restore astronomical images through atmosphere turbulence. Our system takes very short exposures, on the order of the atmospheric coherence time. The rapidly changing turbulence leads to a very variable point spread function (PSF), and the variability of the PSF leads to some frames having better quality than the rest. Only the best frames are selected, aligned and co-added to give a final image with much improved angular resolution. Our system mainly consists of five parts: preprocessing, frame selection, image registration, image reconstruction, and image enhancement. Our lucky imaging system has been successfully applied to restore the astronomical images taken by a 1.23m telescope. We have got clear images of moon surface and Jupiter, and our system can be demonstrated to greatly improve the imaging resolution through atmospheric turbulence.

Citation Download Citation

Shixue Zhang, Yuanhao Wu, Jinyu Zhao, and Jianli Wang "Astronomical image restoration through atmosphere turbulence by lucky imaging", Proc. SPIE 8009, Third International Conference on Digital Image Processing (ICDIP 2011), 80090B (8 July 2011); https://doi.org/10.1117/12.896183

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