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:
Nov. 30, 1999
Filed:
Dec. 16, 1997
Applicant:
Inventor:
Shinichi Sunakawa, Asaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382170 ; 382250 ; 382280 ; 382281 ; 382176 ;
Abstract
To improve an area cut-out ratio, a difference value between coefficients which are neighboring in an image block is calculated by a difference value calculation unit, an average value and a dispersion value of the difference value data are calculated by a distribution state calculation unit, and the average value and the dispersion value are compared with preset threshold values by a threshold value determination unit, thereby determining whether the relevant block is a character pattern area or not.