Systems and methods for arriving at an auto focus Figure of...

Details Systems and methods for arriving at an auto focus Figure of... Systems and methods for arriving at an auto focus Figure of...

2008-03-11

2008-03-11

Patel, Kanjibhai (Department: 2624)

Image analysis

Image enhancement or restoration

Focus measuring or adjusting

C382S274000, C348S345000

Reexamination Certificate

active

10946771

ABSTRACT:
A method comprises detecting edges in at least a region of a captured focus image, using adjacent pixels of the region to obtain first edge detection results and filtering the first edge detection results. The first filtering comprises comparing differences in pixel contrast in the first edge detection results with a first threshold value and removing the differences in pixel contrast that are less than the first threshold value from the first edge detection results. The method further comprises detecting edges in at least the region, using non-adjacent pixels of the region to obtain second edge detection results and filtering the second edge detection results. The second filtering comprising comparing differences in pixel contrast in the second edge detection results with a second threshold value and removing the differences in pixel contrast that are less than the second threshold value from the second edge detection results.

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patent: 2002/0191973 (2002-12-01), Hofer et al.

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