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题名:
Restoration of solar and star images with phase diversity-based blind deconvolution
作者: Li, Qiang1,2; Liao, Sheng1; Wei, Honggang1; Shen, Mangzuo1
刊名: CHINESE OPTICS LETTERS
出版日期: 2007-04-10
卷号: 5, 期号:4, 页码:201-203
文章类型: Article
英文摘要: The images recorded by a ground-based telescope axe often degraded by atmospheric turbulence and the aberration of the optical system. Phase diversity-based blind deconvolution is an effective post-processing method that can be used to overcome the turbulence-induced degradation. The method uses an ensemble of short-exposure images obtained simultaneously from multiple cameras to jointly estimate the object and the wavefront distribution on pupil. Based on signal estimation theory and optimization theory, we derive the cost function and solve the large-scale optimization problem using a limited memory Broyden-Fletcher-Goldfarb-Shanno (L-BFGS) method. We apply the method to the turbulence-degraded images generated with computer, the solar images acquired with the swedish vacuum solar telescope (SVST, 0.475 m) in La Palma and the star images collected with 1.2-m telescope in Yunnan Observatory. In order to avoid edge effect in the restoration of the solar images, a modified Hanning apodized window is adopted. The star image still can be restored when the defocus distance is measured inaccurately. The restored results demonstrate that the method is efficient for removing the effect of turbulence and reconstructing the point-like or extended objects.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Optics
研究领域[WOS]: Optics
关键词[WOS]: OBJECT
收录类别: SCI
语种: 英语
WOS记录号: WOS:000255023600005
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3557
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Opt & Elect, State Key Lab Opt Technol Microfabricat, Chengdu 610209, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Li, Qiang,Liao, Sheng,Wei, Honggang,et al. Restoration of solar and star images with phase diversity-based blind deconvolution[J]. CHINESE OPTICS LETTERS,2007,5(4):201-203.
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