Image processing circuit providing improved image quality

Details Image processing circuit providing improved image quality Image processing circuit providing improved image quality

Filed on

2003-07-24

Date issued

2008-11-25

Examiner

Tran, Nhan T (Department: 2622)

Patent Class

Television

SubClass

Camera, system and detail

SubSubClass

Combined image signal generator and general image signal...

Other Related Categories

C348S243000, C348S222100

Type

Reexamination Certificate

Status

active

Patent number

07456876

Description

ABSTRACT:
An image processing circuit for a color image sensor, comprising a color sensitivity correction circuit which adds/subtracts a predetermined offset to/from pixel signals being output by amplifying photoelectric conversion signals of pixels, which have photoelectric conversion element and are arranged in column and row directions, for each column, and multiplies the result by a predetermined gain, wherein the predetermined offset includes a first offset, which is set according to each color, and a second offset, which is set according to a plurality of columns. According to the present invention, the offset of the color sensitivity correction circuit includes a first offset, which is set according to each color, and a second offset, which is set according to a plurality of columns, therefore, periodic moiré in the vertical direction, which is caused by the column output circuit and the output signal supply circuit for each column, can be suppressed, and image quality can be improved.

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