Calibrating the scanner
You
need
to
perform
calibration
in
order
to
ensure
the
work
of
the
scanner
after
the
adjustment
of
lenses.
Specifically
for
this
purpose
we
use
the
calibration
plate,
which
is
pre-measured
with
high
accuracy.
Scanning
software
analyses
the
image
of
the
plate,
obtained
from
the
cameras
and
compares
it
with
the
mathematical
model,
marked
by
the
algorithm.
There
are
3
types
of
calibration:
Full
calibration
,
fast
calibration
(orientation)
and
Calibration
of
turntable
(finding
the
table
axis)
.
Full
calibration
is
used:
●
if
the
lenses
of
the
cameras
need
to
be
reconfigured
(for
example,
if
you
change
the
scanning
area),
●
if
you
suspect
that
scanning
accuracy
got
worse,
●
after
transporting
the
scanning
complex.
Fast
calibration
is
used:
●
if
you
suspect
that
the
camera
moved
due
to
unreliable
mounting,
●
if
you
want
to
check
the
accuracy
of
performed
calibration,
●
before
the
work
with
the
scanner
(recommended).
Calibration
of
rotary
table
is
performed:
●
in
case
of
any
change
in
the
position
of
the
rotary
table
to
the
scanner
(when
scanning
on
the
turntable).
Calibration
of
rotary
table
is
described
in
the
Scanning
on
the
turntable
section.
Calibration plate
Calibration plate is a special plate with markers, the distance between which is
measured with high accuracy. It is used for setting up a scanner and its calibration.
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