Focus detection device

Details Focus detection device Focus detection device

1995-06-30

1997-11-18

Metjahic, Safet

Photography

With exposure objective focusing means, focusing aid, or...

With electronic filtering

396121, G03B 310, G03B 1334

Patent

active

056897405

ABSTRACT:
A focus detection device to improve the level of confidence of focus detection results of an object image by determining the defocus amount based on the filter processing data computed by a filter processing circuit for high frequencies of the subject image is disclosed. Computations may be repeated related to successively lower frequencies until a high level of confidence of the computed defocus amount is achieved.

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patent: 5469240 (1995-11-01), Uchiyama et al.
patent: 5485002 (1996-01-01), Kusaka
patent: 5485003 (1996-01-01), Kusada

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