Improving Image Resolution by 45-Degree Tilting-Mode Sampling
Jing Yu, Le-Le Yao, Zhenchun Chang, Weidong Sun · 2017
A pushbroom sensor consists of a line of sensors arranged perpendicular to the flight direction of the spacecraft.The earth's surface is imaged as the spacecraft flies forward.Supermode sampling using a pair of linear arrays in quincunx arrangement has been implemented on the SPOT5 earth observation satellite.In this paper, we propose a 45-degree tilting-mode sampling model with a square grid, whose sampling density achieves 2 times that of standard sampling, and then apply the estimated MTF of the real tilting-mode imaging system to ORC-based image restoration thanks to the anisotropic spectral support of 45-degree tilting-mode sampled images.Experimental results on simulated and real images validate the performance of the proposed method. 1