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:
Feb. 20, 2001
Filed:
Nov. 21, 1997
Shigeru Mizoguchi, Kawasaki, JP;
Koji Fukunaga, Tokyo, JP;
Kenji Maeda, Yokohama, JP;
Kiyoshi Katano, Chiba, JP;
Takahiro Onsen, Yokohama, JP;
Makoto Kobayashi, Yokohama, JP;
Jin Sunata, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
To provide an image reading device capable of reading a high-quality image under the conditions such as compactness, simplification, and low power consumption, an image reading apparatus using this image reading device, and a method therefor, white reference data for white level correction is stored in a memory in correspondence with a reference temperature. A temperature near the image reading device is detected, and white reference data is corrected on the basis of the temperature difference between the detected temperature and the reference temperature. The corrected white reference data is used in white level correction of an image signal output from a CCD included in the image reading device.