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Date Posted: 12:26:52 02/06/03 Thu
Author: chris
Subject: Turning off colors on scanned images

High speed document scanners usually work with
1 bit images (black/white). They may be equipped
with red, green or blue lamps to process documents
that are printed on red, green or blue paper.
Background of those colors are simply recognised as
white. <br>
Another possibility consists of scanning the
documents with a color scanner and eliminating
the, say, red channel to suppress anything that
is red on the document. Before recognising objects
on such images, e.g. OCR test or bar codes, these
images have to be converted to 1 bit.<br>
How do i achieve this the fastes way, i.e.
suppress one of the color channels and convert
the image to black and white?

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