HIKVISION iVMS-4200 User Manual page 72

the value is, the easier the mode switches. The filtering time refers to the interval
time between the day/night switch. You can set it from 5s to 120s.
Scheduled-Switch: Set the start time and the end time to define the duration for
day/night mode.
Triggered by alarm input: The switch is triggered by alarm input. You can set
the triggered mode to day or night.
Smart IR: Set the supplement light as ON, and the device can adjust the
supplement by adjusting the distance. E.g., if the object is near the camera, the
device adjusts the supplement light to lower power, and the light is in higher
power if the object is far away.
Backlight Settings

BLC Area: If you focus on an object against strong backlight, the object will be
too dark to be seen clearly. BLC compensates light to the object in the front to
make it clear. OFF, Up, Down, Left, Right, Center, Auto, and Custom are
selectable.
Note: If BLC mode is set as Custom, you can draw a red rectangle on the live
view image as the BLC area.
WDR: Wide Dynamic Range can be used when there is a high contrast of the
bright area and the dark area of the scene.
HLC: High Light Compression function can be used when there are strong lights
in the scene affecting the image quality.
White Balance

White balance is the white rendition function of the camera used to adjust the
color temperature according to the environment.
Network Camera User Manual
Figure 9-4 Backlight Settings
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