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. 30, 2008
Filed:
Aug. 23, 2005
Hiroshi Asai, Kyoto, JP;
Yasuhiro Takemoto, Kyoto, JP;
Hiroshi Asai, Kyoto, JP;
Yasuhiro Takemoto, Kyoto, JP;
Dainippon Screen Mfg. Co., Ltd., Kyoto, JP;
Abstract
In a matrix area (), a plurality of highlight-side dot centers () and a plurality of shadow-side dot centers () are regularly arranged and a plurality of reference points () are set while being distributed almost uniformly. Each of the dot centers () is rotated about a nearest reference point (). Threshold values of the matrix area () are determined so that halftone dot areas should be changed around a plurality of highlight-side dot centers () after being rotated in accordance with the variation in gray level on the highlight side and a halftone dot area (i.e., joined dot areas) should be changed around a plurality of shadow-side dot centers after being rotated in accordance with the variation in gray level on the shadow side. In a halftone dot image generated by using the matrix area which is thus generated, it is possible to suppress moire and graininess.