Image analysis – Color image processing – Color correction
Patent
1998-06-30
2000-05-30
Coles, Edward L.
Image analysis
Color image processing
Color correction
382260, 358504, 358513, 358514, 358516, 358533, 358406, 348243, 348246, 348241, 348251, H04N 148, H04N 160, H04N 967, G06K 960
Patent
active
060699736
ABSTRACT:
A method for calibrating a multi-chip image sensor, and an imaging system having a multi-chip sensor that includes color correction factors generated by such a method. The image sensor is successively controlled to image three different test targets. After imaging each target, a set of correction factors is generated and used to correct image signals generated when imaging the next test target. A first set of correction factors corrects for pixel-to-pixel variations between imaging elements in the array. The second set of correction factors corrects for chip-to-chip variations between chips in the array. The third set of correction factors corrects for array-wide variations compared to a standard color chart.
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Li Hong
Lin Ying-wei
Coles Edward L.
Henry, Jr. Coulter
Xerox Corporation
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