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:
Oct. 05, 2004
Filed:
Oct. 27, 2000
Hiroyuki Morimatsu, Fukuoka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An image processing method is provided for reproducing multi-gradation image data in the form of a bi-gradation image as used particularly in a printer, a scanner, a copier, a facsimile, etc. The method comprises acknowledging a pixel arrangement around a target pixel through examining an on/off-state of each pixel of a binary form, calculating error correction data from the pixel arrangement, and carrying out a binary coding of multi-gradation image data. Accordingly, as the error data for a binary form of the multi-gradation image data is corrected depending on the density of its actual printed form, unstable artifacts generated in the reproduction of pixels can be suppressed during the binary coding.