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一种用于射电天文图像重建的自适应尺度算法

Improved Deconvolution Algorithm for Radio Interferometric Images
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摘要 为了解决在成像过程中反卷积点扩展函数所带来的模糊效应,提出一种新的图像重建算法.新算法利用高斯函数分解模型,能够有效解决基于Delta函数分解模型所引起的问题,并在重建延展源和致密源方面具备更好的效果.通过VLA模拟观测数据对算法进行测试,并与现有的2类图像重建算法进行比较,结果表明,新算法能够有效平衡现有的反卷积算法的计算复杂度和性能问题,能对图像进行更加精确建模,具有更好的图像重建性能. A new reconstruction algorithm is proposed to resolve the problem of deconvolution of the point spread function during the imaging process.The algorithm is based on the decomposition of Gaussian function model,which can solve the problems from delta function model and can reconstruct extended sources and point-like sources well.The algorithm is tested with a simulated observation with VLA and compared with another 2 algorithms.The results indicate that the improved algorithm can effectively balance computational complexity and performances,make more accurate modeling of the image,and shows superior image reconstruction performances.
作者 张利 米立功 肖一凡 杨江河 李桂城 卫星奇 宁娜文 李丹杨 贺春林 ZHANG Li;MI Ligong;XIAO Yifan;YANG Jianghe;LI Guicheng;WEI Xingqi;NING Nawen;LI Danyang;HE Chunlin(College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, China;College of Physics and Electronics, Qiannan Normal College for Minorities, Duyun 558000, Guizhou China;Computer School, China West Normal University, Nanchong 637002, Sichuan China;College of Mathematics and Physics, Changde 415000, Hunan China)
出处 《吉首大学学报(自然科学版)》 CAS 2020年第4期44-49,共6页 Journal of Jishou University(Natural Sciences Edition)
基金 国家自然科学基金资助项目(11963003,U2031112) 国家重点研发计划项目(2018YFA0404602) 贵州省教育厅青年科技人才成长项目(黔教合KY字[2018]119,433) 贵州大学引进人才科研基金项目(贵大人基合字(2018)60号) 中国科学院太阳活动重点实验室基金(KLSA201805) 贵州省科技计划项目(黔科合平台人才[2017]5788号) 天文学本科专业建设项目(2016XBJKX0202) 黔南民族师范学院一流平台项目(2019XJG0302)。
关键词 综合孔径成图 图像重建算法 CLEAN算法 通用天文软件程序包 synthetic aperture imaging image reconstruction algorithm CLEAN algorithm common astronomy software applications(CASA)
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  • 1E Caroli, J B Stephen, G Di Cocco, et al. Coded aperture imaging in X- and gamma-ray astronomy [J]. Space Science Reviews, 1987, 45: 349-403.
  • 2Golay M J. Point arrays having compact, nonredundant autocorrelations [ J ]. Journal of the Optical Society of America, 1971, 61(2) : 272-273.
  • 3E E Fenimore, T M Cannon. Coded aperture imaging with uniformly redundant arrays [ J ]. Applied Optics, 1978, 17(3) : 337-347.
  • 4S R Gottesman, E J Schneid. PNP--A new class of coded aperture arrays [ J ]. IEEE Transsctions on Nuclear Science, 1986, 33(1) : 745-749.
  • 5A R Gourlay, J B Stephen. Geometric coded aperture masks [ J ]. Applied Optics, 1983, 22 ( 24 ) : 4042-4047.
  • 6G K Skinner. Coded-mask imaging in gamma-ray astronomy [EB/OL]. [2011-11-20]. http:// arxiv, org/abs/astro-plr/0302354.
  • 7R J Proctor, G K Skinner, A P Willmore. The design of optimum coded mask X-ray telescopes [ J]. Monthly Notices of the Royal Astronomical Society, 1979, 187: 633-643.
  • 8J A Hogbom. Aperture synthesis with a non-regular distribution of interferometer baselines [ J ]. Astronomy and Astrophysics, 1974, 15 (2) : 417-426.
  • 9U J Schwarz. Mathematical-statistical description of the iterative beam removing t on. Ast. Ast A- RAY ASTRONOMY TALUCCI, echnique (method CLEAN) [ J ]. Astronomy and Astrophysics, 1978, 65 (2) : 345-356.
  • 10G A Wagenknecht. A contour tracing and coding algorithm for generating 2D contour codes from 3D classified objects [J]. Pattern Recognition, 2007, 40(4) : 1294-1306.

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