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7.2.2.3 Backlight
Figure 7-14
Parameter
Function
Mode
BLC
The device auto exposures according to the environments
situation so that the darkest area of the video is cleared
HLC
After you enabled HLC function, the device can lower the
brightness of the brightest section according to the HLC control
level. It can reduce the area of the halo and lower the
brightness of the whole video.
The value ranges from 1 to 100. The default value is 50 when
HLC is on.
HLC is enabled only when anti-flicker is outdoor and exposure
mode is auto.
WDR
For the WDR scene, this function can lower the high bright
section and enhance the brightness of the low bright section.
So that you can view these two sections clearly at the same
time.
The value ranges from 1 to 100. When you switch the camera
from no-WDR mode to the WDR mode, system may lose
several seconds record video.
SSA
(Scene
Self-adaptation)
The system will auto adjust the image brightness according to
the environmental brightness, which is to make the object
display clearly in the scene.
OFF
It is to disable the BLC function. Note that this function is
disabled by default.