天文学进展2016，Vol.34Issue(1)：94-110,17.DOI:10.3969/j.issn.1000-8349.2016.01.06
高分辨率太阳图像重建方法
High Resolution Solar Image Reconstruction
摘要
Abstract
High spatial resolution solar observations contribute to the in-depth studying of the solar atmosphere and solar physics problems. Ground-based large diameter solar tele-scopes often obtain high spatial resolution images by the adaptive optics (AO) technique and the image reconstruction technique. The AO can well reduce the low-order aberrations but still remains residuals significant. As the AO correction is partial, the image reconstruction technique is being in demand to further correct the higher-order aberrations. Current solar image reconstruction techniques mainly include the speckle imaging and the phase diversity. The speckle imaging techniques are some kinds of high resolution reconstruction methods based on statistical computation. The most used methods are the speckle interferometry and the speckle masking. The phase diversity is a method to recover the object from the focal image and the defocused image in the absence of the atmospheric information. In this paper, firstly, we introduce the principle of the speckle imaging methods. Then describe the basic processes and several key steps of the solar reconstruction of the speckle imaging. The main steps include flat-field correction, data alignment, segmentation, amplitude and phase recovery. We also introduce the principle of the multi-frame blind de-convolution and the phase diversity. A simple diagram is shown to distinguish their differences. We compare the characteristics of the speckle imaging and the phase diversity. Finally, we expound the application and the development trend in the solar high resolution observations. The main methods of the solar image reconstruction for the next generation big telescopes are still the speckle imaging technique and the phase diversity, and we believe the real-time observation of the sun will achieve with the development of the modern computer technology.关键词
高分辨率图像重建/太阳像/斑点成像术/相位差法Key words
high spatial resolution reconstruction/solar image/speckle imaging/phase diversity分类
天文与地球科学引用本文复制引用
向永源,刘忠,金振宇,杨磊..高分辨率太阳图像重建方法[J].天文学进展,2016,34(1):94-110,17.基金项目
国家自然科学基金(11203077,11203074) （11203077,11203074）
