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:
Aug. 01, 1989
Filed:
Nov. 17, 1988
Applicant:
Inventors:
Yuji Katsuta, Nara, JP;
Hiroshi Kamata, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358455 ; 358464 ; 382 52 ;
Abstract
An image signal binary encoder converts a document image photoelectrically into analog signals and then into digital image signals by an analog-to-digital converter. A small area is considered around each point of interest and the average density value of the area is compared with the density value of the point of interest. A choice is made between an ordinary binary conversion method and a dither method according to the result of this comparison.