Dahua NVR52-4KS2 Series User Manual page 272

Step 2 Select the channel and AI type.
Click Add to add a rule.
Step 3
Step 4 On the Type list, select Intrusion.
Step 5 Draw the detection rule.
1. Click to draw the rule on the surveillance video image. Right-click the image to stop
drawing.
Figure 5-137 IVS
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User's Manual