Comparison of Optical Sparse Aperture Image Restoration with Experimental PSF and Designed PSF

Designed PSF Zhiwei Zhou, Dayong Wang Applied Science, Beijing University of Technology, Beijing, 100124, P.R.China Juan Zhao, Yuhong Wan, Zhuqing Jiang, Shiquan Tao Applied Science, Beijing University of Technology, Beijing, 100124, P.R.China Abstract The digital post-processing method is needed to restore the image quality from the blurring image output directly from optical sparse aperture imaging systems. The common method for post-processing is the Wiener filter, where the important parameter is the point spread function (PSF). The Wiener filter will deconvolve the convolution effect if the PSF is the precise impulse response of the optical sparse aperture system. Usually it is hard to measure the PSF experimentally. On the contrary, it is easy to calculate the PSF based on telescope array configuration, which is given by design. In order to evaluate whether the calculated PSF is adaptable to the image restoration, a comparison of the image restoration has been done by using these two kinds of PSFs. The results show that the calculated PSF works well in the case that the co-phasing error is small, while the measured PSF is ineffective.