Yoav Y. Schechner Nahum Kiryati The Optimal Axial Interval in Estimating Depth from Defocus. 843-848 1999 conf/iccv/1999 ICCV https://doi.org/10.1109/ICCV.1999.790309 https://doi.ieeecomputersociety.org/10.1109/ICCV.1999.790309 db/conf/iccv/iccv1999.html#SchechnerK99