Akira Kubota Kazuya Kodama Yoshinori Hatori Image-Based Refocusing by 3D Filtering. 385-398 2007 conf/psivt/2007 PSIVT http://dx.doi.org/10.1007/978-3-540-77129-6_35 db/conf/psivt/psivt2007.html#KubotaKH07