Method and apparatus for estimating an in-focus position

Details Method and apparatus for estimating an in-focus position Method and apparatus for estimating an in-focus position

2006-02-10

2009-02-03

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S201400, C348S094000

Reexamination Certificate

active

07485834

ABSTRACT:
A method is provided of estimating an in-focus position of a target in an image scanning apparatus. A first part of the target is scanned at a nominal focus level so as to obtain corresponding image information. One or more further parts of the target are scanned at one or more respective further focus levels so as to obtain corresponding image information. A focus parameter is then calculated for each of the nominal and the one or more further focus levels using the respective image information. An in-focus position common to each of the first and further parts of the target is then estimated using the calculated focus parameters. Corresponding apparatus for performing the method is also provided.

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“Entering the Age of Fluorescence Imaging in Digital Slide Technology”; Hamamatsu Photonics K.K., Systems Division; Nov. 2006; Japan.

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