36
Temperature Readout
Function
The camera’s internal temperature can be read from the
temperature sensor installed in the circuit board. Its
accuracy is ±2°C. Use this value as a general guide.
Defect Correction
It corrects clear defect points and opaque defect points
of the image sensor. From the peripheral pixels,
correction is performed on coordinate pixels in which
defects are detected. Factory setting and user setting can
be selected.
Defect correction setup procedure
1
Set conditions in which clear defect points are
prone to occur.
Below is an example in which gain is 18 dB and the
shutter is 1 second. Prevent as much light as
possible from entering such as by blocking light.
>GAIN 18
>EXP 1000000
2
Set the threshold in units of 14 bits.
Points are detected as clear defect points when this
level is exceeded. Below is an example for 3200
step/14bit. Pixels that indicate 3200 to 16383 are
detected.
>DEFECT-THRESHOLD 3200
3
Execute clear defect point detection.
Detection takes four times the EXP time setting.
The output levels on the same x coordinate axis are
shown below. The levels uniformly indicate around
1000 steps when an all-black image is taken, but
defect pixels (at high levels) are present in some
locations. All pixels whose levels exceed 3200
steps, which was set in step 2, are detected.
>DEFECT-DETECTION 1
4
Send a DEFECT-DETECTION command to
confirm that the detection is completed.
End if 0 is returned.
5
Execute opaque defect point detection.
Like the clear defect point detection, set the image
pickup conditions and the threshold in units of 14
bits. Below is an example for 10000 step/14bit.
Pixels that indicate 0 to 10000 steps are detected. If
are not setting opaque defect points, you can skip
this step.
>DEFECT-THRESHOLD 10000
>DEFECT-DETECTION 2
6
Send DEFECT-DETECTION command to confirm
that the detection is completed.
End if 0 is returned.
7
Select the data for applying defect correction.
To apply the pixels detected in steps 3 and 4, select
2. To apply factory settings, select 0. To apply
values that have been saved, select 1.
>DEFECT-PATTERN-LOAD 2
Command
TEMPERATURE
Command
Parameter
Setting
DEFECT-
CORRECTION
0
Correction off
1
Correction on
Command
Parameter
Setting
DEFECT-
PATTERN-
LOAD
0
Factory setting
1
User setting
2
Data detected using
DEFECT-DETECTION
Defect pixel
Pixels that
are
detected
Pixels that
are not
detected
Defect pixel
Pixels that
are not
detected
Pixels that
are
detected
