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:
Apr. 12, 2011
Filed:
Nov. 01, 2006
Takahiro Ike, Tokyo, JP;
Masakazu Yoshida, Kanagawa, JP;
Takashi Kimura, Kanagawa, JP;
Masanori Hirano, Kanagawa, JP;
Shigetoshi Hosaka, Kanagawa, JP;
Takahiro Ike, Tokyo, JP;
Masakazu Yoshida, Kanagawa, JP;
Takashi Kimura, Kanagawa, JP;
Masanori Hirano, Kanagawa, JP;
Shigetoshi Hosaka, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A disclosed dither matrix is used in halftone processing for converting input image data having M input halftone levels into output image data having N (M>N>2) output halftone levels. In the halftone processing, a concentration type dither matrix is used as the dither matrix when an input halftone level is within a range of input halftone levels corresponding to an output halftone level that is lower than a predetermined threshold level T (N>T>1), and a dispersion type dither matrix is used as the dither matrix when the input halftone level is within a range of input halftone levels corresponding to an output halftone level that is equal to or higher than the predetermined threshold level T.