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:
Aug. 15, 2017
Filed:
Apr. 30, 2015
Mitchell J. Bogart, Sharon, MA (US);
Mitchell J. Bogart, Sharon, MA (US);
Rampage LLC, Sharon, MA (US);
Abstract
System and method of calibration, screening, and compensation for multiple gray-level digital presses. Unequal quantization of the input range is employed with compensated overlapping of sub-ranges. Multiple instances of bi-level screening algorithms, tone modification functions, and a recombination algorithm are employed to produce calibrated screening on individual tone ranges. The method works with any bi-level screening algorithm and devices with any number of gray-levels. Quality imaging results from high detail, high tonal accuracy, low screening noise, and lack of printed artifacts. Dynamic re-calibration is facilitated. The elimination of the constraint of evenly spaced gray-levels has advantages of cost and yield for print head fabricators and digital press manufacturers. Multiple implementations are given for hardware and software embodiments. The present invention, which comprises a print profile for each colorant, is extended to comprise additional print profiles, as needed, specifying the print characteristic of a single or group of aberrant nozzles.