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. 09, 2011
Filed:
Dec. 12, 2007
Anthony Michael King, Lexington, KY (US);
Mark Eric Miller, Versailles, KY (US);
Anthony Michael King, Lexington, KY (US);
Mark Eric Miller, Versailles, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
A method for providing image illumination calibration includes: generating a plurality of images of a calibration target at a plurality of exposure levels, each image of the plurality of images being represented by a total pixel area; identifying a plurality of zones of the total pixel area, each zone of the plurality of zones corresponding to a particular image of the plurality of images at a particular exposure level of the plurality of exposure levels, with each zone representing a pixel sub-area that excludes saturated pixels; combining the plurality of zones for the plurality of images of the calibration target to generate a final calibration image; and generating a shading table to correct the final calibration image to obtain a uniform image of the calibration target over the total pixel area, the shading table including gain and offset values associated with each pixel of the total pixel area.