Dahua NVR52-4KS2 Series User Manual page 206

Parameter
Mirror
Flip
AI SSA
Exposure
Backlight Mode
Description
Switch the left and right sides of the video image. It is disabled by
default.
This function is available on select models.
Set video display direction. It includes normal, 180°, 90°, and 270°.
After you enable AI SSA (AI Scene Self-adaptation), the camera can
detect environmental conditions, such as rain, fog, backlight, low light
and flicker, to adjust the parameters of the image to suit the conditions,
ensuring that clear images are always produced.
When AI SSA is enabled, some image parameters such as exposure and
backlight mode will become unavailable.
This function is available when the camera is
●
equipped with the auto iris lens.
After you enable auto iris function, the iris can
●
automatically zoom in and zoom out according
to the brightness of the environment and the
Auto Iris
image brightness changes accordingly.
If you disable the auto iris function, the iris is at
●
the biggest value. The iris does not automatically
zoom in or zoom out according to the brightness
of the environment.
This function specially applies to the image whose
frame rate is configured as 2 at least. It reduces the
3D NR
noise by using the information between two frames.
The bigger the value is, the better the effect.
You can set camera backlight mode.
SSA: In the backlight environment, the system can automatically
●
adjust image brightness to clearly display the object.
BLC:
●
Default: The device performs automatic exposures according to
the environment situation to make the darkest area of the video
clear.
Customize: After you select the specified zone, the system can
expose the specific zone so that the zone can reach the proper
brightness.
WDR: In backlight environment, the system lowers the high bright
●
section and enhances the brightness of the low bright section, so
that you can view these two sections clearly at the same time.
HLC: In the backlight environment, the system lowers the
●
brightness of the brightest section, reduces the area of the halo and
lowers the brightness of the whole video.
Close: Disable the BLC function.
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User's Manual