Scan Quality
Copyright © 2008 BERTL Inc.
September 4, 2008
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Page 21
August 2008
Contex SD4400
www.bertl.com
ADAPTIVE THRESHOLDING
Adaptive thresholding is a scanning technology that
cleans up engineering blueprints and other deteriorated
drawings. We test the scanner’s ability to clean up the
drawings both in terms of the result and also how easy it is
to find the best settings for this process. We try to avoid
over-cleaning so crucial information is not lost.
With adaptive thresholding, scoring is based on a
subjective scale from:
•
Best
– The best available in the industry in terms of
clean up and ease of use.
•
Good
– Good clean-up result, better than average
and easy to use.
•
Average
– Average clean-up result and average ease
of use.
•
Poor
– The clean up result is poor, and it is difficult
find the best setting.
•
N.A.
– Adaptive clean up is not available.
SD4400 series
Adaptive Thresholding
Test Result
Best
Original scanned in color.
After adaptive scanning.
Original scanned in color.
With adaptive thresholding.