Compensation for exposure time variation when scanning with...

Details Compensation for exposure time variation when scanning with... Compensation for exposure time variation when scanning with...

2005-01-10

2008-11-04

Ishrat, Sherali (Department: 2624)

Image analysis

Image enhancement or restoration

Reexamination Certificate

active

07447375

ABSTRACT:
A method of compensating for image intensity variation in a scanline of a scanned image caused by variation in sensor integration time in a non-shuttered CCD image sensor comprising the steps of (a) determining for the scanline a multiplicative compensation factor, Kc (b) multiplying the sensed intensity of light received by sensor elements present in the CCD image sensor for the scanline by Kc to produce a compensated intensity value for the scanline and (c) employing the compensated intensity value in an image processing pipeline to produce the scanned image.

REFERENCES:
patent: 6831687 (2004-12-01), Suzuki
patent: 7092581 (2006-08-01), Winsor et al.
patent: 2006/0033825 (2006-02-01), Li et al.

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