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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 7026608 B1

PDFFull Text
Expired
Date of Patent:
Apr. 11, 2006

Filed:

Mar. 25, 2003

Gain correction of image signal and calibration for gain correction

Applicant:

Akira Hirai, Tochigi, JP;

Inventor:

Akira Hirai, Tochigi, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Morgan & Finnegan, LLP

Primary Examiner:

David Porta

Assistant Examiner:

Frederick F Rosenberger

Int. Cl.
CPC ...
G06K 9/38 (2006.01); H05G 1/64 (2006.01); G01D 18/00 (2006.01); G12B 13/00 (2006.01); H01L 27/146 (2006.01); G01T 1/24 (2006.01); G01T 1/20 (2006.01);
U.S. Cl.
CPC ...
Abstract

The gain difference between pixels is to be corrected for an image signal obtained by an image sensing element having a plurality of pixels. The first reference image is sensed without any object, and then an object is sensed. Gain correction is performed for the sensed object image by using the first reference image. To perform gain correction again, the second reference image is sensed without any object. Gain re-correction is performed for the object image having undergone gain correction by using the first and second reference images.

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Hirai, Akira. (2006). Gain correction of image signal and calibration for gain correction (U.S. Patent No. 7026608). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7026608

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