Image Restoration using Mirroring Method Which Based on the Gradient Direction I Komang Somawirata, Aryuanto Soetedjo, Sotyohadi Sotyohadi, Fitri Utaminingrum and Maizirwan Mel E3S Web Conf., 188 (2020) 00011 Published online: 08 September 2020 DOI: 10.1051/e3sconf/202018800011