Black Level Control - IAI SP-20000M-PMCL User Manual

SP-20000-PMCL User Manual (Ver. 3.1)

Black Level Control

This function adjusts the setup level.
Variable range: -256 to 255 LSB (at 12-bit output)
Model
Monochrome
Color
Auto Black Control
The auto black control function is used to automatically adjust the black level of the sensor, which may
vary due to temperature changes and/or the exposure time. It can adjust up to 30% of the video output
level.
It has three modes which have different compensation values and the user can choose an appropriate
mode depending on the application. As the dynamic range of the sensor depends on the
compensation value of the black level, for best results, it is recommended that the camera be used
under low temperature conditions, i.e., less than 30°C and with exposure times of less 1 frame, in
order to maintain an appropriate dynamic range.
The compensation value can be automatically varied up to 30%. In this mode, the dynamic range is the
Auto
smallest.
In this mode, the limit of the black level compensation value can be set in the range of 0% to 30% by 1%
steps. If the camera is used in an environment with little temperature change or short exposure time,
Limit
this mode can automatically provide an appropriate balance between black level compensation and
dynamic range by setting the upper limit of the black level compensation.
In this mode, the camera automatically saves the temperature and the status of the exposure time just
before this mode is set. Then, it sets the appropriate black level compensation value and the maximum
dynamic range in accordance with the saved conditions. After this automatic adjustment, the
compensation value, which is indicated by percentage, can be read out.
Fix
In this mode, the black level compensation value is fixed. It is recommended to use this mode if the
temperature and exposure time are stable. If the black level varies due to temperature change and/or
exposure time variation, it is necessary to set this mode again in order to learn the new environmental
conditions. If the environmental conditions are expected to be varied, it is recommended to use Auto or
Limit mode.
Black Level Selector
Black Level All
Black Level All
Black Level Red
Black Level Blue
- 105 -
Main Functions
Black Level
-256 ~ +255
-256 ~ +255
-512 ~ +511
-512 ~ +511