Setup and Installation
Copyright © 2008 BERTL Inc.
September 4, 2008
All Rights Reserved. The license under which this document is made available and applicable law prohibit any reproduction or further transmission of any portion of this document. This
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Page 7
August 2008
Contex SD4400
www.bertl.com
SCANNER CALIBRATION
After you install the software, you must conduct a series of
scanner calibrations in order to ensure that the scanner
delivers optimal scanning quality. Calibration is
straightforward, especially with the included illustrated
setup guide that is designed to provide a language-free
visualization of the calibration procedure. The SD4400
series has six CIS elements, and the first step is to ensure
that all cameras are aligned correctly both horizontally and
vertically.
Before beginning calibration, clean the transparent contact
plates located inside the scanner and the surface of the
document scanning table. Any dust or dirt on these
surfaces may affect the calibration results and the
resulting image quality. Also check that the calibration
sheet is free of dust or dirt.
The Scanner Calibration wizard is a fully automated tool
for calibrating the SD series of scanners.
The scanner calibration process is handled by a wizard
that guides you through the different steps. You only need
to load the calibration sheet into the scanner when
directed to do so, and the wizard completes the task.
The calibration takes you through five steps:
Horizontal and vertical stitching
Basic
calibration
Graytone
calibration
Camera matching
Color
calibration
The Scanner Calibration wizard, which comes with the
scanner, performs the five calibration steps.
After the scanning calibration process, we ran our stitching
test chart to detect horizontal and vertical stitching
problems. We didn’t observe any horizontal or vertical
stitching problems.
The picture below shows a perfect horizontal and vertical
alignment between cameras. The 45° angled lines are
used for vertical alignment. When vertical alignment is not
set properly, it shows up as jagged angle lines. A
horizontal stitching problem shows up when the horizontal
line is not straight.
Stitching test chart: We did not observe any
horizontal or vertical stitching problems.
The whole calibration procedure process took about 20
minutes to complete.
