1. Active Computer Vision by Cooperative Focus and Stereo;Krotkov,1989
2. A new focus measure method using moments;Zhang;Image Vis. Comput.,2000
3. Measure of image sharpness using eigenvalues;Wee;Inf. Sci.,2007
4. Machine Vision: Theory, Algorithms Practicalities;Davies,1990
5. Automatic focus and iris control for video cameras;Baina,1995