And have a look at the other manpages belonging to sane as well. So
typing
export SANE_DEBUG_SCSI=128
export SANE_DEBUG_ARTEC=128
scanimage -d artec:/dev/scanner --mode gray --resolution 10 >/dev/null
and writing down what you get shouldn't be that difficult.
Regarding /dev/scanner: Your device might be different, but
it will be defined in /etc/sane.d/artec.conf or a similar place.
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