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:
Jul. 09, 1996
Filed:
Apr. 04, 1995
Applicant:
Inventor:
Norihiro Sakaguchi, Yokohama, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348222 ; 348229 ; 348252 ; 348255 ;
Abstract
A digital electronic still camera operable in a text mode for clearly shooting a bilevel image, e.g., characters printed or formed on a document. A luminance signal can be roughly corrected with respect to shading by a simple circuit arrangement. This corrects a decrease in the quantity of light in the peripheral portion of a frame and thereby renders characters or similar bilevel images in a picture highly legible.