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题名:
Approaches to convergence enhancement of multiframe blind deconvolution of astronomical images
作者: Luo Lin; Wang Li; Cheng Wei-Dong; Shen Mang-Zuo
刊名: ACTA PHYSICA SINICA
出版日期: 2006-12-01
卷号: 55, 期号:12, 页码:6708-6714
关键词: atmospheric optics ; astronomical observations ; image processing and restoration
文章类型: Article
英文摘要: The convergence property of multiframe blind deconvolution applied to improve the resolution of astronomical images is influenced by initial object estimate, constraint conditions and photon noise. A method of determining band limitation of the point-spread function from the optical imaging system parameters is proposed. The initial object estimate of blind deconvolution algorithm is formed by using Knox-Thompson method to reconstruct object phase from short-exposure images. A novel method, which is used to decrease photon noise, edge effects and ringing of restoration images is developed. An improved multiframe blind deconvolution algorithm with a strict constrained optimization method of the expectation-maximization based on maximum-likelihood estimation is presented. The restored images of the simulation data, and real Mars and solar-granulation data show that the proposed multiframe blind deconvolution algorithm is valid for overcoming effects of atmospheric turbulence and photon noise and improving the resolution of real observed astronomical images, and capabel of partly removing the diffraction effect of optical system on restored images.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Multidisciplinary
研究领域[WOS]: Physics
关键词[WOS]: MAXIMUM-LIKELIHOOD ; PHASE-DIVERSITY
收录类别: SCI
语种: 英语
WOS记录号: WOS:000243900800089
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3527
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.SW Jiaotong Univ, Coll Sci, Chengdu 610031, Peoples R China
2.Chinese Acad Sci, Inst Opt & Elect, State Key Lab Opt Technol Microfabricat, Chengdu 610209, Peoples R China
3.Chengdu Univ Informat Technol, Chengdu 610041, Peoples R China

Recommended Citation:
Luo Lin,Wang Li,Cheng Wei-Dong,et al. Approaches to convergence enhancement of multiframe blind deconvolution of astronomical images[J]. ACTA PHYSICA SINICA,2006,55(12):6708-6714.
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