Dahua XVR User Manual page 234

Now you can draw a rule. Left click mouse to draw a line, until you draw a rectangle, you
can right click mouse.
Click Ok to complete the rule setup.
For detailed setups, please refer to chapter 4.8.3.1.1 motion detect for detailed
information.
4.8.3.3 Face Detect (Optional)
The face detection function is optional. The intelligence function and the
human face detection can not be valid at the same time!
When camera detects human face, system can draw a rectangle around the human face
and generate an alarm.
From main menu->Setup->Event->Face detect, the interface is shown as in Figure 4-74.
 Enable face boost: Check the box here, system can enhance the human face display
pane.
 Sensitivity: System supports 6 levels. The sixth level has the highest sensitivity.
For detailed
Figure 4-73
setups, please refer to chapter 4.8.3.1.1.
225