Entropy-based depth from focus
- 1 April 1993
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America A
- Vol. 10 (4) , 561-566
- https://doi.org/10.1364/josaa.10.000561
Abstract
The two-image depth-from-focus problem is reconsidered in terms of entropy loss in a linear filter. It is shown that this formulation leads to a relatively simple solution whose variance is equal to or less than that from a regression approach. The formulation is appropriate even when the point-spread function of the optical system is not well suited to a low-order regression fit or when both images used contain some degree of defocusing with distance.Keywords
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