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:
Dec. 26, 2000
Filed:
Apr. 06, 1998
Miel Renaud, Tokyo, JP;
Koichi Hashimoto, Tokyo, JP;
RISO Laboratory, Inc., Tokyo, JP;
Abstract
When an original wherein a plurality of binary image areas in different density or the like coexist is printed by stencil making, tone characteristics of a tone image area are preserved and blur or extinction of a faint letter, or smear of a letter written on a dark background in a binary image area is prevented from occurring and print without incongruity due to density different is obtained. An image processing apparatus comprises first analyzing device which analyzes whether a target pixel is in a binary image area or a tone image area, second analyzing device which calculates a secondary line feature indicative value regarding density difference between a line and its background when the target pixel is composing a line in a thickness equal to or less than a certain value, judging device which judges the degree or likelihood of weather the target pixel is in a binary image area or a tone image area by a grade, based on analysis result by the first analyzing device and the secondary line feature indicative value, adopted-density conversion device which converts density of the target pixel based on the judgment result, and binary conversion device which upon necessity converts the target pixel having been density-converted into binary data.