首页> 外文期刊>Journal of the Optical Society of America, A. Optics, image science, and vision >MISTRAL: a myopic edge-preserving image restoration method, with application to astronomical adaptive-optics-corrected long-exposure images
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MISTRAL: a myopic edge-preserving image restoration method, with application to astronomical adaptive-optics-corrected long-exposure images

机译:MISTRAL:一种近视保留边缘的图像恢复方法,应用于天文自适应光学校正的长时间曝光图像

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摘要

Deconvolution is a necessary tool for the exploitation of a number of imaging instruments. We describe a deconvolution method developed in a Bayesian framework in the context of imaging through turbulence with adaptive optics. This method uses a noise model that accounts for both photonic and detector noises. It additionally contains a regularization term that is appropriate for objects that are a mix of sharp edges and smooth areas. Finally, it reckons with an imperfect knowledge of the point-spread function (PSF) by estimating the PSF jointly with the object under soft constraints rather than blindly (i.e., without constraints). These constraints are designed to embody our knowledge of the PSF. The implementation of this method is called Mistral. It is validated by simulations, and its effectiveness is illustrated by deconvolution results on experimental data taken on various adaptive optics systems and telescopes. Some of these deconvolutions have already been used to derive published astrophysical interpretations.
机译:去卷积是利用许多成像仪器的必要工具。我们描述了在通过自适应光学湍流成像的背景下在贝叶斯框架中发展的反卷积方法。此方法使用一个噪声模型,该模型同时考虑了光子噪声和检测器噪声。此外,它还包含一个正则化术语,适用于混合了尖锐边缘和平滑区域的对象。最后,通过在软约束而不是盲目(即无约束)的情况下与对象一起估算PSF,可以得出点扩展函数(PSF)的知识不完善的结论。这些限制旨在体现我们对PSF的了解。此方法的实现称为Mistral。通过仿真验证了这一点,并通过在各种自适应光学系统和望远镜上获得的实验数据的反卷积结果证明了其有效性。这些反褶积中的一些已经被用来导出已发表的天体物理学解释。

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