80
Goldeye
G
Technical
Manual
V
2.0.0
Data
processing
path
Non
‐
uniformity
correction
(NUC)
Every
pixel
of
an
InGaAs
sensor
possesses
its
individual
amount
of
dark
signal
(dark
signal
non
‐
uniformity,
DSNU)
and
an
individual
sensitivity
for
light
(photo
response
non
‐
uniformity,
PRNU).
Thus,
while
exposing,
each
sensor
creates
a
specific,
non
‐
uniform
underlying
pattern.
This
pattern
can
be
compensated
with
help
of
the
non
‐
uniformity
correction.
To
correct
the
non
‐
uniformity,
correction
values
for
gain
and
offset
of
each
pixel
are
determined
on
the
basis
of
multiple
reference
images,
and
applied
to
the
actual
image.
Ideally,
after
correction
no
image
structure
is
recognizable.
However,
there
are
various
conditions
that
influence
the
image
quality:
•
analog
gain
setting
•
sensor
temperature
•
exposure
time
These
conditions
need
corresponding
correction
data
for
best
correction
quality.
Thus,
the
camera
contains
a
number
of
correction
data
sets
for
a
range
of
conditions.
Since
each
correction
data
set
is
applicable
under
certain
conditions
only,
the
relevant
conditions
are
stored
with
the
data
set.
An
automated
data
set
selection
feature
keeps
track
of
the
conditions.
If
any
of
the
parameters
changes,
the
most
suitable
correction
data
set
is
selected
automatically.
No
additional
user
interaction
is
necessary.
Set
to
Continuous
,
this
function
updates
the
data
set
selection
for
every
frame.
The
table
below
describes
the
features
to
control
the
Non
‐
uniformity
correction
and
the
functionality
associated
with
them.
ImageCorrectionControl
/
NonUniformityCorrection
Category
for
non
‐
uniformity
correction
control
NUCMode
Type:
Command
Controls
the
operating
mode
of
the
non
‐
uniformity
correction.
Depending
on
the
factory
‐
provided
correction
data,
different
modes
may
be
available.
Access:
(R)/W
Unit:
Visibility:
Beginner
Values:
Off,
OnePoint,
TwoPoint
Table
41:
GenICam features for the non‐uniformity correction
Summary of Contents for Goldeye G
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