Title :
A matrix based method for determining depth from focus
Author :
Ens, John ; Lawrence, Peter
Author_Institution :
Sch. of Comput. Sci., Simon Fraser Univ., Burnaby, BC, Canada
Abstract :
The authors reveal some fundamental problems with inverse filtering: inaccuracies in finding the frequency-domain representation, windowing effects, and border effects. A general, matrix-based method using regularization that eliminates these problems is presented. The method is confirmed experimentally, with the results showing an RMS (root mean square) error of 1.3%
Keywords :
computer vision; border effects; depth from focus; frequency-domain representation; inverse filtering; matrix-based method; regularization; windowing effects; Apertures; Cameras; Filtering; Focusing; Frequency; Geometrical optics; Image segmentation; Layout; Lenses; Solid modeling;
Conference_Titel :
Computer Vision and Pattern Recognition, 1991. Proceedings CVPR '91., IEEE Computer Society Conference on
Conference_Location :
Maui, HI
Print_ISBN :
0-8186-2148-6
DOI :
10.1109/CVPR.1991.139760
