Comparison of image restoration methods applied to inland aquatic systems images aquired by HR CBERS 2B sensor

Often images are slightly blurred due to the blurring effect of sensors (optical diffractions, detectors size, eletronic filters). As a consequence, the effective resolution is, in general, worse than the nominal resolution that corresponds to the detector projection on the ground that does not take into account sensor imperfections. Thus restoration techniques aims at deblurring the image and this way improving its spatial resolution up to a certain level. In this paper different restoration methods are applied and evaluated to restore CBERS-2B images: Wiener filter, Richardson-Lucy, Modified Inverse Filter and a Row Action Projection filter. In the experiments images of HR CBERS-2B covering inland water regions are restored. Results showed that Richardson-Lucy approach outperformed the others.