Sean G. P. O'Brien Jochen Trumpf Viorela Ila Robert E. Mahony Calibrating Light-Field Cameras Using Plenoptic Disc Features. 286-294 2018 3DV https://doi.org/10.1109/3DV.2018.00041 https://doi.ieeecomputersociety.org/10.1109/3DV.2018.00041 conf/3dim/2018 db/conf/3dim/3dv2018.html#OBrienTIM18