Lexmark International, Inc.

Alison Beth Ternent

Aditya Jayant Angal

A method for compensating for a contaminated calibration target used in calibrating a scanner having a plurality of sensor pixels includes (a) scanning a calibration target to generate a respective plurality of calibration data samples for each sensor pixel of the plurality of sensor pixels; (b) for calibration data samples associated with a current sensor pixel of the plurality of sensor pixels, removing any calibration data sample that corresponds to a region of calibration target contamination, leaving filtered calibration data samples; (c) determining a gain value for the current sensor pixel based on the filtered calibration data samples; (d) repeating acts (b) and (c) for a next sensor pixel until a respective gain value is determined for each of the plurality of sensor pixels; and (e) applying the determined gain values to the plurality of sensor pixels for use in subsequent image scanning by the scanner.

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Midway, KY, United States of America

Alison Beth Ternent