Image Reconstruction of Photonics Integrated Interference Imaging System: stablized CLEAN methods

Photonics Integrated Interference Imaging System (PIIIS) is a recently developed far-filed imaging approach aiming at high imaging performance and compact structure. Several sampling lenslet arrays have been proposed to acquire higher imaging quality. These lens configurations provide low-frequency intensive but high-frequency sparse measurements of complex visibility. However, this kind of sampling will induce Gibbs-ringing artifacts in inverse Fourier images. In this article, entropy prior and smoothness prior are proposed to remove the ringing artifacts, and stabilized CLEAN algorithms based on those priors are used to reconstruct images. A simulation experiment using hierarchical multistage sampling lens array is implemented, and the results show that these algorithms can eliminate the ringing artifacts.