I.R.I.S. IRISPen Express 6 for Windows - Manual (Page 27)

C HAPTER 3 - S TARTING UP
23
C ALIBRATING THE PEN SCANNER
Before you start using the IRISPen, you must calibrate the pen
scanner. If you don't calibrate the scanner, the image quality will be
low and the recognition results may be mediocre.
You are automatically prompted to calibrate the pen scanner when
running the software for the first time. All you need to do is push
your pen on a white piece of paper for a few seconds. The
software indicates when the calibration is complete.
Caution:
If the ambient light changes - imagine you get from natural to
artificial lighting or conversely, imagine you move to a much
lighter or darker place, or even move to a completely different
environment, etc., you may need to re-execute the calibration of
your pen scanner.
Tip:
Check the scanning quality
You can always check the scanning quality in the Image Quality Check and
the Scan Test windows (see: Starting up, User interface). If the image
quality appears degraded, please re-execute the calibration of your pen
scanner.