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:
Jun. 11, 2002
Filed:
May. 17, 1999
Applicant:
Inventors:
Nobuhiko Nakahara, Shizuoka-ken, JP;
Hiroki Umezawa, Shizuoka-ken, JP;
Assignee:
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/205 ;
U.S. Cl.
CPC ...
B41J 2/205 ;
Abstract
In a multilevel error diffusion process, an input image signal Din with tones and an image correction signal Ecd are added together to produce a corrected image signal Dinc, which in turn is converted into an eight-level image signal to provide an output image signal Dout with eight tones. To convert the input image signal into the output image signal, there are provided a plurality of conversion tables and a switching means for selectively switching the conversion tables at random. The conversion tables are switched with each pixel in the corrected image signal.