@article{AhmadXSL2014, title = {3D to 2D bijection for spherical objects under equidistant fisheye projection}, author = {Ahmad, A and Xavier, J and Santos-Victor, J and Lima, P}, journal = {Computer Vision and Image Understanding}, volume = {125}, pages = {172--183}, month = aug, year = {2014}, doi = {10.1016/j.cviu.2014.04.004}, month_numeric = {8} }