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. 04, 2006
Filed:
May. 14, 2001
Makoto Hiramatsu, Kanagawa, JP;
Motohiro Ishikawa, Kanagawa, JP;
Makoto Hiramatsu, Kanagawa, JP;
Motohiro Ishikawa, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Image data having a high S/N ratio is obtained even when the exposure time is relatively long. To achieve the above object, there is provided an image input apparatus in which an accumulation mode is set with the shutter open, thereby acquiring image data A. The shutter is then closed, and the accumulation mode is set to acquire subtraction data between the image data and black image data A. This processing is repeated to acquire image data Aand subtraction data Aand these subtraction data are added. These operations AAand Aare repeated a predetermined number of times to update addition data, and image processing is performed on the basis of the updated addition data.