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. 28, 1998
Filed:
Mar. 17, 1997
Applicant:
Inventor:
Hiroshi Matsushima, Machida, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
396289 ; 396296 ; 396234 ; 396 51 ;
Abstract
An image taking apparatus including a photometry device that detects a luminance value for each of a plurality of areas of a photometric field, a selection circuit that selects one of the plurality of areas to be a reference area, a computing circuit that computes a difference value for each of the plurality of areas, each difference value representing a difference between the luminance value for a respective area and the luminance value for the reference area, and a display device that respectively displays the difference values for each of the plurality of areas.