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题名:
The speckle image reconstruction of the solar small scale features
作者: Zhong, Libo1,2,3; Tian, Yu1,2; Rao, Changhui1,2
出版日期: 2014
会议名称: Proceedings of SPIE: International Symposium on Optoelectronic Technology and Application 2014: Image Processing and Pattern Recognition
会议日期: 2014
学科分类: Atmospheric thermodynamics - Atmospheric turbulence - Diffraction - Earth (planet) - Image processing - Image segmentation - Pattern recognition - Plastic deformation - Restoration - Speckle - Telescopes
DOI: 10.1117/12.2073104
中文摘要: The resolution of the astronomical object observed by the earth-based telescope is limited due to the atmospheric turbulence. Speckle image reconstruction method provides access to detect small-scale solar features near the diffraction limit of the telescope. This paper describes the implementation of the reconstruction of images obtained by the 1-m new vacuum solar telescope at Full-Shine solar observatory. Speckle masking method is used to reconstruct the Fourier phases for its better dynamic range and resolution capabilities. Except of the phase reconstruction process, several problems encounter in the solar image reconstruction are discussed. The details of the implement including the flat-field, image segmentation, Fried parameter estimation and noise filter estimating are described particularly. It is demonstrated that the speckle image reconstruction is effective to restore the wide field of view images. The qualities of the restorations are evaluated by the contrast ratio. When the Fried parameter is 10cm, the contrast ratio of the sunspot and granulation can be improved from 0.3916 to 0.6845 and from 0.0248 to 0.0756 respectively. © 2014 SPIE.
英文摘要: The resolution of the astronomical object observed by the earth-based telescope is limited due to the atmospheric turbulence. Speckle image reconstruction method provides access to detect small-scale solar features near the diffraction limit of the telescope. This paper describes the implementation of the reconstruction of images obtained by the 1-m new vacuum solar telescope at Full-Shine solar observatory. Speckle masking method is used to reconstruct the Fourier phases for its better dynamic range and resolution capabilities. Except of the phase reconstruction process, several problems encounter in the solar image reconstruction are discussed. The details of the implement including the flat-field, image segmentation, Fried parameter estimation and noise filter estimating are described particularly. It is demonstrated that the speckle image reconstruction is effective to restore the wide field of view images. The qualities of the restorations are evaluated by the contrast ratio. When the Fried parameter is 10cm, the contrast ratio of the sunspot and granulation can be improved from 0.3916 to 0.6845 and from 0.0248 to 0.0756 respectively. © 2014 SPIE.
收录类别: Ei
语种: 英语
卷号: 9301
ISSN号: 0277786X
文章类型: 会议论文
页码: 93012X
Citation statistics:
内容类型: 会议论文
URI标识: http://ir.ioe.ac.cn/handle/181551/7820
Appears in Collections:自适应光学技术研究室(八室)_会议论文

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作者单位: 1. Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu, China
2. Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, China
3. University of Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Zhong, Libo,Tian, Yu,Rao, Changhui. The speckle image reconstruction of the solar small scale features[C]. 见:Proceedings of SPIE: International Symposium on Optoelectronic Technology and Application 2014: Image Processing and Pattern Recognition. 2014.
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