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:
Feb. 20, 1990
Filed:
May. 15, 1987
Yasuo Hongo, Kanagawa, JP;
Kouichi Toyama, Kanagawa, JP;
Fuji Electric Co., Ltd., Kanagawa, JP;
Abstract
A binarizing apparatus used for optical character readers or character-and-graphic input devices, in which a sharp binary image can be obtained even from low-contrast character lines (or line segments) by discriminating a line graphic from stains wider than the character lines or from blurs in the background thereof. Eight surrounding subwindows are disposed around a target subwindow enclosing a target pixel, the surrounding subwindows being separated from each other at a distance larger than the character line width, and each of the subwindows having 3.times.3 pixels. The average density value of the respective subwindow is calculated to thereby compare the respective density values of the target subwindow and each surrounding subwindow or compare the density values of the respective surrounding subwindows. Consequently, whether the target pixel belongs to character line or whether it does not belong thereto, is judged to thereby perform binarizing.