Dahua NVR21-4KS3 Series User Manual page 309

Step 2 Select a channel, and then click Add.
Step 3 Select the Enable checkbox.
Step 4 Click to draw abnormal detection rule and area.
under Parameters, and then select Self-adaptive or Custom.
Step 5 Click
1. Select the alarm type.
● Self-adaptive: The algorithm will customize the number of people who have
reached crowding based on target pixels in the current image.
● Custom: You can customize the number of people who have reached crowding as
need.
You can configure the alarm level and the number of people.
Figure 5-180 Abnormal Detection
Figure 5-181 Self-adaptive
289
User's Manual