COVIR: A virtual rendering of a novel NN architecture O-Net for COVID-19 Ct-scan automatic lung lesions segmentation. - Kahina Amara; Ali Aouf; Hoceine Kennouche; Oualid Djekoune; Nadia Zenati; Oussama Kerdjidj; Farid Ferguene (Comput. Graph., 2022)