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:
Dec. 25, 2007
Filed:
Dec. 07, 2004
Boon Keat Tan, Penang, MY;
Jlin Cheang Cheong, Penang, MY;
Chung Min Thor, Taman On, MY;
Avago Technologies ECBUIP (Singapore) Pte. Ltd., Singapore, SG;
Abstract
The color of a surface is determined by tracking the position of the surface using grayscale image sensing and then using captured grayscale image information, position information, and grayscale-to-color conversion information to determine color. In one embodiment, the technique requires establishing grayscale-to-color conversion information and a relationship between position and the grayscale-to-color conversion information. A calibration pattern is printed on a piece of paper and the surface of the paper is illuminated. Grayscale image information and position information related to the surface is generated in response to the illumination. Color-specific portions of the grayscale-to-color conversion information that are to be used in color determination are selected based on the position information. Grayscale image information related to the calibration pattern is then compared to the selected color-specific portions of the grayscale-to-color conversion information to determine the color of the calibration pattern.