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:
Jun. 30, 1998
Filed:
Apr. 04, 1997
Fumio Ishihara, Saitama, JP;
Mutsumi Naruse, Saitama, JP;
Takanori Kohno, Tokyo, JP;
Tetsuo Sakamoto, Tokyo, JP;
Kouichi Kobayashi, Tokyo, JP;
Teruyuki Tongu, Tokyo, JP;
Norifumi Nakagawa, Tokyo, JP;
Tomio Kurosu, Tokyo, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
An exposure control method and apparatus for a camera having a two-area divided brightness measurement system. A central light value is determined based on a central area brightness of a photographic scene, and a peripheral light value is determined based on a peripheral area brightness of the scene. After determining by comparison between the central and peripheral light values whether the scene is back-lighted or front-lighted, a correction coefficient specific to back-lighted scenes or that specific to front-lighted scenes is read from a memory. An exposure value suitable for a main subject is calculated according to the following equation: