[4] CAO Weiguo,XUE Changxi,LI Lijuan,et al.The measurement and system error analysis of diopter and optical parallax in optical pointing system[J].SPIE,2008,6624:1-9.
[9] SUBBARAO M,CHOI T S.Accurate recovery of three dimensional shape from image focus[J].IEEE Transactions on Pattern Analysis and Machine Intelligence,1995,17(3):266-274.