Dahua HCVR8204A-S3, User Manual, Page: 294 / 446

284
Parameter Function
Brightness It is to adjust monitor window brightness. The default value is 50.
The larger the number is , the bright the video is. When you input the value
here, the bright section and the dark section of the video will be adjusted
accordingly. You can use this function when the whole video is too dark or
too bright. Please note the video may become hazy if the value is too high.
The value ranges from 0 to 100.The recommended value ranges from 40 to
60.
Contrast It is to adjust monitor window contrast. The value ranges from 0 to 100. The
default value is 50.
The larger the number is, the higher the contrast is. You can use this
function when the whole video bright is OK but the contrast is not proper.
Please note the video may become hazy if the value is too low. If this value
is too high, the dark section may lack brightness while the bright section may
over exposure .The recommended value ranges from 40 to 60.
Saturation It is to adjust monitor window saturation. The value ranges from 0 to 100.
The default value is 50.
The larger the number is, the strong the color is. This value has no effect on
the general brightness of the whole video. The video color may become too
strong if the value is too high. For the grey part of the video, the distortion
may occur if the white balance is not accurate. Please note the video may
not be attractive if the value is too low. The recommended value ranges from
40 to 60.
Color mode It includes several modes such as standard, color. You can select
corresponding color mode here, you can see hue, brightness, and contrast
and etc will adjust accordingly.
Mirror
It is to switch video up and bottom limit. This function is disabled by default.
Flip
It is to switch video left and right limit. This function is disabled by default. If
you want to flip 90°, the resolution shall not be higher than 720P.
BLC
It includes several options: BLC/WDR/HLC/OFF.

BLC: The device auto exposures according to the environments situation
so that the darkest area of the video is cleared

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.

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.

OFF: It is to disable the BLC function. Please note this function is
disabled by default.