| 一种结合图像复原技术的自适应光学系统控制方法 |
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| 引用本文： | 雍佳伟,田雨,许克峰,饶长辉.一种结合图像复原技术的自适应光学系统控制方法[J].物理学报,2020(6):247-256. |
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| 作者姓名： | 雍佳伟 田雨 许克峰 饶长辉 |
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| 作者单位： | 中国科学院自适应光学重点实验室;中国科学院光电技术研究所;中国科学院软件研究所;中国科学院大学 |
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| 基金项目： | 国家自然科学基金(批准号:11733005,11727805)资助的课题~~ |
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| 摘 要： | 在天文高分辨成像领域,自适应光学校正和事后图像复原都必不可少,但传统的自适应光学系统控制方法以提升光学成像质量为目的,并未考虑图像复原环节,因此,研究一种结合两者以获得高质量复原图像为目标的控制方法具有重要意义.本文对传统自适应光学技术结合事后图像解卷积的方法进行了分析,阐述了其存在的缺陷.首次提出了将自适应光学技术和图像复原技术相结合进行系统分析的思想,并提出了变形镜校正度(变形镜控制电压相对于传统方法控制电压的缩放比例)的概念,通过改变校正度可实现变形镜校正残差和波前传感器探测误差的调整,同时证明了复原图像质量在校正度下降的方向存在一个最优值,用最优校正度来修正变形镜控制电压,就得到了一种新的控制方法.针对点源目标成像,仿真表明该方法相比于传统方法,能够得到质量更好的复原图像.
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| 关 键 词： | 自适应光学技术 图像复原技术 优化控制方法 |
A method of controlling adaptive optical system combined with image restoration technology |
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| Yong Jia-Wei,Tian Yu,Xu Ke-Feng,Rao Chang-Hui.A method of controlling adaptive optical system combined with image restoration technology[J].Acta Physica Sinica,2020(6):247-256. |
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| Authors: | Yong Jia-Wei Tian Yu Xu Ke-Feng Rao Chang-Hui |
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| Affiliation: | (Key Laboratory on Adaptive Optics,Chinese Academy of Sciences,Chengdu 610209,China;Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;Institute of Software,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | In the field of astronomical high resolution imaging,adaptive optical correction and image restoration are necessary,and these two techniques can be used either separately or jointly to improve the quality of observed images.However,for a long time,adaptive optics and image restoration technology have been developing independently because they belong to different research fields,and even though they are combined together,it is just a simple splicing of the two technologies,with no crossover between the two.Such a control method results in adaptive optical correction producing only the best possible intermediate result-optical imaging,but is out of control for the final result-restored image.Therefore,it is of great significance to study a control method that combines the two methods in order to obtain the high-quality restored image.In this paper,the traditional hybrid method(adaptive optics+image post-deconvolution)is analyzed and its defects are expounded.The idea of combining adaptive optics and image restoration for system analysis is proposed for the first time,and the concept of correction degree of deformable mirror(the scaling ratio of control voltage of deformable mirror to that of traditional control voltage)is proposed.By changing the degree of correction,the correction residual of the deformation mirror and the detection error of the wavefront sensor can be adjusted.It is proved that there exists an optimal value of the quality of the reconstructed image in the direction of reducing correction degree,and a new control method is obtained by using the optimal correction degree to correct the control voltage of the deformation mirror.For the application in point target imaging,the simulations are carried out with 37-element and 61-element deformable mirrors under several typical wavefront aberrations,and the results show that this method can obtain a better restoration image than traditional methods.This method has more potential applications in adaptive optical systems with large fitting residuals.The idea that adaptive optics and image restoration are considered as a whole,has not been reported in the literature before,so the work of this paper provides a new way of thinking for the research in related fields. |
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| Keywords: | adaptive optics image restoration technique optimal control method |
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