Automatic focusing apparatus and method for video camera system

Details Automatic focusing apparatus and method for video camera system Automatic focusing apparatus and method for video camera system

1994-12-08

1996-11-19

Metjahic, Safet

Television

Camera, system and detail

Optics

348345, 348349, H04N 5232

Patent

active

055767648

ABSTRACT:
A focusing apparatus of a video camera system and a focusing method, capable of achieving a precise focusing even for an image with both a boundary between white and black and a boundary between white and gray. The focusing apparatus achieves a precise focusing even for an image with both a horizontal luminance signal level and a vertical luminance signal level. The focusing apparatus also achieves a precise focusing even for an object bearing the same kind of colors without a difference in luminance signal level, but with different color concentrations or different kinds of colors with a difference in luminance signal level.

REFERENCES:
patent: 4690001 (1987-09-01), Harvey et al.
patent: 4812912 (1989-03-01), Iida et al.
patent: 4872058 (1989-10-01), Baba et al.
patent: 4985777 (1991-01-01), Kawada
patent: 5182649 (1993-01-01), Miyazaki

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