Method for removing streaks from a scanned image

Details Method for removing streaks from a scanned image Method for removing streaks from a scanned image

2005-12-07

2008-11-18

Tran, Douglas Q (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

C358S463000

Reexamination Certificate

active

07453587

ABSTRACT:
A method for removing streaks from a scanned image includes performing a scanner light source OFF scan to generate a dark image having M rows of pixels and N+W columns of pixels; generating a line noise profile for the N columns of pixels of the dark image; performing a scanner light source ON scan to generate a regular image having M rows of pixels and N+W columns of pixels; processing the W columns of pixels of the regular image to detect a magnitude of the streak in the regular image; use the magnitude of the streak and the line noise profile to predict an amount of dark noise removal for each of the N columns of pixels of the regular image at the location of the streak; and subtracting the predicted amount of dark noise removal for each of the N columns of pixels from the respective N columns of pixels of the regular image.

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