OPERATING AND USER MANUAL QUARTZ SERIES
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Where n indicates the defect pixel test mode according to the following table:
N
DEFECT PIXEL TEST MODE
0
Test mode disabled, normal image input
1
Mark defects white on video
2
Mark defects black on video
3
Show defects as white on black background
Black level control
8.2
Because there are no reference black pixels in the sensor design, there is no ability to continuously
maintain a certain black level. In order to compensate for thermal drift, it is advised to calibrate the
average black level of the camera on a regular interval. The desired black level can be set by the BL
and OFS command for mono and color cameras respectively. Calibration shifts the black level to the
set value.
Enabling black level calibration
8.2.1.
The calibration requires a dark scene.
Command format: BLCAL
Set Black level (only for monochrome)
8.2.2.
In monochrome cameras the average black level of the camera can be set with the BL command.
Command format: BLx
Command format: BL?
Return Message: x
Where x indicates the black level (value in 10 bit output resolution).
NOTE:
The black level in the video output is amplified by the gain setting of the camera.
Set Offset (only for color)
8.2.3.
In order to enable all captured information to be displayed within the digital domain an offset is applied
on the camera output data. Black is not represented by 0, but by the value programmed with the offset
command.
This ensures that all noise information, even when looking at absolute dark, is quantized and
reproduced on the output
Command syntax: OFSx
Where x = 0..1023, the offset in grey levels on a 12 bit scale.
Summary of Contents for Q-12A65
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