Method for focus control

Details Method for focus control Method for focus control

2006-12-08

2011-10-18

Ye, Lin (Department: 2622)

Television

Camera, system and detail

Optics

C348S333050, C348S346000, C348S348000, C348S349000, C382S263000, C382S205000, C382S254000, C382S274000

Reexamination Certificate

active

08040428

ABSTRACT:
A camera or other optical system is focused by generating a plurality of digital images each obtained with a different focus setting of the optical system. These images are analysed to generate for each image a score (S) by comparing first groups of pixels chosen from the image with second groups chosen from the image such that the pixels of each second group have same respective positional relationships with respect to one another as the pixels of the first group with which it is compared have to one another, the score (S) being a function of the number of matches obtained with said comparisons. The focus setting that gives the score corresponding to the largest number of matches is chosen.

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