Correlated auto-focus stabilization method and digital camera

Details Correlated auto-focus stabilization method and digital camera Correlated auto-focus stabilization method and digital camera

2005-04-22

2008-09-23

Perkey, W. B. (Department: 2862)

Photography

Camera shake sensing

C396S123000, C348S208140, C348S352000

Reexamination Certificate

active

07428375

ABSTRACT:
Auto-focus in a digital camera is improved by stabilizing successive images. Each auto-focus image is correlated to previous images so that scene movement or motion can be tracked. The area in the scene where focus figure-of-merit is computed is adjusted according to the amount of scene movement. Also, two separate focus frames may be compared to determine the direction and speed of the motion. This improves the accuracy of the focus figure-of-merit which results in fewer autofocus failures.

REFERENCES:
patent: 5210566 (1993-05-01), Nishida
patent: 2006/0066744 (2006-03-01), Stavely et al.

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