| US 7,590,501 B2 | ||
| Scanner calibration robust to lamp warm-up | ||
| R. Victor Klassen, Webster, N.Y. (US) | ||
| Assigned to Xerox Corporation, Norwalk, Conn. (US) | ||
| Filed on Aug. 28, 2007, as Appl. No. 11/845,969. | ||
| Prior Publication US 2009/0063079 A1, Mar. 05, 2009 | ||
| Int. Cl. G01D 18/00 (2006.01) | ||
| U.S. Cl. 702—85 | 22 Claims |
| 1. A method of calibrating a scanner, comprising:
capturing a black calibration file;
positioning a scan bar near a substantially uniform white calibration strip;
capturing a first white calibration file while a scanner lamp is on;
capturing a second white calibration file;
computing gain and offset values using the black calibration file, the first white calibration file and the second white calibration
file;
capturing multiple white calibration files prior to scanning a first page;
calibrating the scanner using the multiple white calibration files; and
scanning multiple pages after calibrating the scanner.
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