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. 25, 2013
Filed:
Jan. 21, 2011
Omri Shacham, Mitzpe Ramon, IL;
Jan Allebach, West Lafayette, IN (US);
Mani Fischer, Haifa, IL;
Doron Shaked, Tivon, IL;
Carl Staelin, Haifa, IL;
Jin-young Kim, SeongNam-Si, KR;
Yung-yao Chen, West Lafayette, IN (US);
Omri Shacham, Mitzpe Ramon, IL;
Jan Allebach, West Lafayette, IN (US);
Mani Fischer, Haifa, IL;
Doron Shaked, Tivon, IL;
Carl Staelin, Haifa, IL;
Jin-Young Kim, SeongNam-Si, KR;
Yung-Yao Chen, West Lafayette, IN (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A method for designing a screen set for color halftoning includes selecting a screen set that includes at least two screens. The screens are applied to a uniform color image so as to form a set of corresponding colorant halftones. The colorant halftones are superposed to form a color halftone. A spatial frequency spectrum of the color halftone is calculated. Maxima of the spatial frequency spectrum that occur at two effective frequencies are identified, the two effective frequencies being located in two adjacent quadrants of a complex spatial frequency space. A magnitude of each effective frequency is compared with a predetermined frequency magnitude. The screen set is accepted for future application for color halftoning only if both effective frequency magnitudes are greater than the predetermined frequency magnitude. Relating computer program product and data processing system are also disclosed.