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. 22, 2005
Filed:
Mar. 13, 2003
Teruhiko Ueyama, Kanagawa, JP;
Teruhiko Ueyama, Kanagawa, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
An object of this invention is to realize high-precision exposure control while maintaining a short time lag until actual exposure processing is executed after an operation input for the start of image sensing processing. To achieve this object, an exposure control value for executing proper exposure control is calculated by an exposure calculation unit upon reception of an image sensing processing preparation start instruction. Exposure is controlled on the basis of the exposure control value calculated by the exposure calculation unit, and an image is sensed. Whether the exposure calculation unit calculates an exposure control value before an image sensing processing start instruction is received upon reception of the image sensing processing preparation start instruction is determined. If no exposure control value is determined to have been calculated, the luminance level of image information of the image is corrected.