Scan Quality
Copyright © 2008 BERTL Inc.
September 4, 2008
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Page 18
August 2008
Contex SD4400
www.bertl.com
COLOR FRINGING
Color fringing test result.
The same image without color fringing.
The Color Fringing test checks how well the RGB channel
is aligned. We do this by scanning the Grayscale Applied
image test chart (QA-1) in color at the optical resolution to
see if there are any visible color-fringing problems.
As shown, there is no visible color fringing.
SD4400 Series
Color Fringing
Test Result
None
COLOR ACCURACY
For our Color Accuracy test, we used the well-known
ANSI IT8 test chart that is used to calibrate many color
devices.
We scanned the test chart at 300 dpi using the sRGB
color space and a Gamma of 2.2 (default of sRGB). We
then read each patch and compared them with the
reference patches of true color value which determines
the
∆
E value indicating how accurately the scanned colors
match the reference chart. The color accuracy score for
the SD4400 series is good.
SD4400 Series
ANSI IT8.7 Color Matching
Test Result
∆
E=5.1
Average
∆
E=13.2
Worst Case
∆
E=9.9
95%