Sometimes streaks are included on an image during the scan process. For example, they might occur as a result of:
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Marks on the original page.
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Dust in the scanner assembly.
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A faulty Scanner CCD (camera).
These streaks can be removed with the streak removal feature.
The streak removal feature processes each horizontal scan line of the image to detect runs of black pixels. Any series of black pixels less than or equal to the streak width are removed. Even though streak removal processes the image from left to right, its main purpose is to eliminate vertical streaks.