Solar Imaging by Blind Deconvolution of Segments from Multiple frames

Abstract

A short-exposure solar image observed on the ground is given as the convolution of a solar surface structure and an instantaneous point-spread-function (PSF) of an atmosphere-telescope system 1. Thus, one can hardly observe finer structure on the solar surface than a seeing-disk size. The iterative blind deconvolution (BD) proposed by Ayers and Dainty 2 is a powerful tool for recovering the solar image atmospherically degraded. We have proposed two BD methods based on the iterative BD methods, multiframe BD 3 and segment-image BD 4. The former method consists of the application of the iterative BD method to several frames observed at different times. In the latter method, the iterative BD method is applied to images segmented from a single frame. In this paper, we present a BD method using images segmented from multiple frames, referred to as a segmented-multiframe BD (SMBD) method, which is a fusion of the previous two methods.