由斑点图重建天文图像的方法

Methods of Astronomical Image Reconstruction from Speckle Image

首先介绍了斑点图形成机制以及获取方法,并借助计算机模拟了斑点图的生成。然后重点描述斑点图的图像重建方法,包括频率域和空间域重建方法。在频率域重建方法部分依次详细叙述了用于复原模信息的斑点干涉法和用于复原相位信息的由模复原相位法、Knox-Thompson法、斑点掩模法;空间域重建方法部分介绍了典型的LWH法和迭代位移叠加法;另外,盲消卷积法也为斑点图重建提供了新的思路,文章对此方法也做了介绍;特别地,还对国内在该领域的相关工作做了介绍;关于斑点图重建方法在天文学、天体物理学等领域的应用,文章做了有针对性的介绍;最后一章是斑点图图像重建方法的总结。

This article is mainly intended to give a review of how astronomical images are reconstructed from speckle images. The speckle image formation mechanism and acquisition method are introduced and the computer simulated speckle images are demonstrated first. Then the methods of speckle image reconstruction is described, including methods in both frequency domain and spatial domain. In the frequency part of the article, speckle interferometry for retrieving modulus information is introduced. Knox-Thompson, speckle masking and phase reconstruction from modulus for retrieving phase information are also introduced in the frequency part. LWH method and iterative shift-and-add method are introduced in the spatial part. Some methods that are based on blind deconvolution and have emerged recently are also introduced in this article. And then the research work at this field did researchers in China's Mainland has been highlighted. Not only the methods of astronomical image reconstruction themselves but their applications are also introduced in the article. Some scientific achievements on astronomy, astrophysics and solar physics have been included. Research on binary star system that makes use of speckle image reconstruction takes a significant part due to the simplicity of the object. For the same reason speckle image reconstruction has been shown great power to help binary star system related research. The relevant methods are summarized at the end of the article.