Electronic camera having a clamp circuit and performing a...

Details Electronic camera having a clamp circuit and performing a... Electronic camera having a clamp circuit and performing a...

2005-02-03

2009-08-04

Ometz, David L (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S362000, C348S229100, C348S234000, C348S221100

Reexamination Certificate

active

07570289

ABSTRACT:
An electronic camera includes a CCD imager. A first specific evaluation area is assigned to one end in a horizontal direction of an effective area formed on an imaging surface, and a second specific evaluation area is assigned to the other end in a horizontal direction of the effective area. Also, a first clamp area is assigned in an optical black area in vicinity of the first specific evaluation area, and a second clamp area is assigned in an optical black area in vicinity of the second specific evaluation area. A luminance evaluation circuit obtains a first luminance evaluation value with respect to the first specific evaluation area and obtains a second luminance evaluation value with respect to the second specific evaluation area. In addition, a clamp circuit performs a clamping process on a raw image signal taking note of the first clamp area or the second clamp area. A CPU switches the area to be noted for the clamping process between the first clamp area and the second clamp area based on the first luminance evaluation value and the second luminance evaluation value.

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