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:
May. 19, 2015
Filed:
Jan. 06, 2012
Kartheek Chandu, Longmont, CO (US);
Mikel Stanich, Longmont, CO (US);
Chai Wah Wu, Hopewell Junction, NY (US);
Barry M. Trager, Yorktown Heights, NY (US);
Kartheek Chandu, Longmont, CO (US);
Mikel Stanich, Longmont, CO (US);
Chai Wah Wu, Hopewell Junction, NY (US);
Barry M. Trager, Yorktown Heights, NY (US);
Ricoh Production Print Solutions LLC, Boulder, CO (US);
Abstract
A method is disclosed. The method includes generating a Continuous Tone Image (CTI) with all pixel values same as the first gray level and an initial Half Tone Image (HTI) with all pixel values equal to minimum absorptance level, computing a change in pixel error by toggling with all the possible output states and swapping with all neighbor pixels only if the stacking constraint is satisfied, updating the HTI with the maximum error decrease operation and continue to next pixel location till the end criteria is met. Once the end criteria is met, the updated HTI is saved as a final halftone screen for that gray level and copied as the initial HTI for the next gray level along with CTI pixel values updated to the next gray level till the final gray value is reached.