Image pickup device with brightness correcting function and...

Details Image pickup device with brightness correcting function and... Image pickup device with brightness correcting function and...

Filed on

2005-07-26

Date issued

2009-02-03

Examiner

Patel, Kanji (Department: 2624)

Patent Class

Image analysis

SubClass

Image enhancement or restoration

SubSubClass

Intensity, brightness, contrast, or shading correction

Other Related Categories

C358S521000

Type

Reexamination Certificate

Status

active

Patent number

07486836

Description

ABSTRACT:
An image pickup device includes a histogram generation unit which generates a histogram representing a brightness distribution of digital image data (RAW data) acquired during picture taking and a table change unit which calculates an amount of correction with reference to a target brightness value based on the histogram and changes gradation correction information of a gamma lookup table in accordance with the amount of correction. A gamma correction unit corrects gradation of the image data using the changed gradation correction information to generate a taken image whose brightness is corrected in accordance with the target brightness value.

REFERENCES:
patent: 6462835 (2002-10-01), Loushin et al.
patent: 6463172 (2002-10-01), Yoshimura
patent: 6583820 (2003-06-01), Hung
patent: 6850214 (2005-02-01), Nishitani et al.
patent: 2003/0099407 (2003-05-01), Matsushima
patent: 10-198802 (1988-07-01), None
patent: 7-274062 (1995-10-01), None
patent: 2002-237995 (2002-08-01), None
patent: 2003-179809 (2003-06-01), None
patent: 2003-219205 (2003-07-01), None
Patent Abstracts of Japan, vol. 1998, No. 12, Oct. 31, 1998 and JP 10-198802 A (Seiko Epson Corp.), Jul. 31, 1998—Abstract.

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