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《Optical Technique》 2018-05
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Experimental investigation of lucky imaging algorithm based on 2m astronomical telescope

MAO Longhua;LI Binhua;ZHANG Xiliang;JI Kaifan;JIN Zhenyu;Faculty of Information Engineering and Automation,Kunming University of Science and Technology;Yunnan Astronomical Observatories,CAS;  
Lucky imaging is a relatively simple post image processing technique,which uses an image-quality evaluation function to evaluate quality of short exposure images and then a few of high quality images are selected,shifted and added to give a much higher resolution image.According to the classical algorithm of lucky imaging technology,a lucky imaging solution for the 2.4 mtelescope is presented,and a local GPU acceleration algorithm is proposed.A high-resolution image of binary star with an angular separation of 0.3″is obtained.The GPU acceleration algorithm is designed to conduct parallel computing during the image selecting period.The feasibility of the acceleration algorithm for lucky imaging and its calculation bottleneck are discussed.The experimental results show that the images taken by 2 mlarge aperture telescope under the near infrared condition can be used to rebuild a high-resolution image(FWHM 0.2″)by lucky imaging technology.A GPU device can accelerate the lucky imaging algorithm,and improve the efficiency of the whole algorithm.
【Fund】: 国家自然科学基金资助项目(11673009)
【CateGory Index】: TP391.41
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