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. 10, 2001
Filed:
Dec. 16, 1998
Paul Michel, Redwood City, CA (US);
Ramin Samadani, Menlo Park, CA (US);
Electronics for Imaging, Inc., Foster City, CA (US);
Abstract
A calibration apparatus and method for a color printer that allows a user to calibrate a printer without the use of expensive measuring instruments and prior user training is provided. The calibration process prints out two target layouts. On the first target the user selects the primary inks start and end points (highlights and shadows), and the black ink only input value that generates a 30% gray. The primary inks are the device-dependent colorants, cyan, magenta and yellow. The second target compares the 30% black ink with grays made of a combination of cyan, magenta and yellow inks. The user selects the best match in an iterative process. Using this data, calculations are made of the corrections to the original input signal values for the printer. A look up table is updated with corrected input values to compensate for the printer deviation from its standard behavior.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile