Hajime Nagahara Sujit Kuthirummal Changyin Zhou Shree K. Nayar Flexible Depth of Field Photography. 60-73 2008 ECCV (4) http://dx.doi.org/10.1007/978-3-540-88693-8_5 conf/eccv/2008-4 db/conf/eccv/eccv2008-4.html#NagaharaKZN08