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.:
Date of Patent:
Apr. 11, 2006
Filed:
Mar. 25, 2003
Applicant:
Akira Hirai, Tochigi, JP;
Inventor:
Akira Hirai, Tochigi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
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.