Technical Manual
15
WDR
Wide Dynamic Range, or WDR, is a process where the camera 
captures an image both with short and a long exposure in order 
to balance the darker areas with the brighter, highlighted areas 
to maximize the visibility of details in both areas. It differs from 
Backlight Compensation (discussed later) in that the camera 
attempts to adjust the contrast in both areas. This is best used in 
WDR Off WDR On
areas with uneven lighting. The settings are High, Medium and Low. This option may also be disabled depending on your Exposure 
settings.
Defog
For use in areas frequently obscured by haze or fog, the Defog filter adjusts the camera’s contrast in order to provide clearer details. 
This can also be used when the subject is very brightly lit. You can set it to High, Medium or Low.
Backlight
This selection consists of two submenus which allow you to 
optimize camera performance in areas which are lit from behind. 
BLC stands for Back Light Compensation. This first option 
is designed for areas such as a room where the camera 
faces a window through which sunlight enters. It allows you 
to compensate using low, middle or high gain which will 
progressively brighten the area on the screen to compensate for 
the relative darkness of the area lit from behind. You can adjust 
BLC
GAIN MIDDLE
AREA ON
DEFAULT 
RETURN RET
BLC
GAIN MIDDLE
AREA ON
DEFAULT 
RETURN RET
the size of the area, along with its position from within the Area option. Pushing up or left will shrink the area, while down or right will 
enlarge it. It can then be positioned as desired. 
HSBLC, or High Spotlight Back Light Compensation is for 
situations where lights will be shining towards the camera. This 
is the setting used when trying to capture images of license 
plates for identification. As seen in the photos on the right, the 
brightest light sources are blocked by the camera allowing the 
plate to be read as opposed to washed out by the headlights.
Please see our online knowledge base at www.Q-See.com/
Support for guides on how to best capture license plate images. 
HSBLC Off HSBLC On










