User manual
4. Web-based Interface
NDF821/NDF821E l User Manual 27
OFF/ON: Choose to enable or disable the BLC function.
BLC area setting: BLC area refers to the dark area where more details are expected. Dene your
BLC area by clicking squares displayed on the screen and then click Save BLC Window to save the
setting.
Digital Wide Dynamic Range
When there are both very bright and very dark areas simultaneously in the eld of view, you can
enable Digital Wide Dynamic Range (WDR) function. It optimizes an image to ensure that dark areas
are more visible while retaining details in bright areas.
Level: Depending on the contrast/dynamic range of a scene, you can select different level of
WDR. Higher level of WDR suits for higher contrast/dynamic scene. If you select Auto mode, the
camera will automatically adjust the WDR level by itself depending on the scene.