Digital Video Recorder User Manual 
 
177 
   
Please refer to the User Manual of Network Camera for the detailed instructions for the vehicle 
detection.   
10.3  Line Crossing Detection   
Purpose 
This function can be used for detecting people, vehicles and objects cross a set virtual line. The line 
crossing direction can be set as bidirectional, from left to right or from right to left. And you can set 
the duration for the alarm response actions, such as full screen monitoring, audible warning, etc.   
Step 1 Enter the VCA settings interface. 
Menu> Camera> VCA 
Step 2 Select the camera to configure the VCA.   
You can click the checkbox of Save VCA Picture to save the captured pictures of VCA 
detection.   
Step 3 Select the VCA detection type to Line Crossing Detection. 
Step 4 Check the Enable checkbox to enable this function. 
Step 5 Click    to configure the trigger channel, arming schedule and linkage actions for the line 
crossing detection alarm.   
Step 6 Click the Rule Settings button to set the line crossing detection rules.   
1)  Select the direction to A<->B, A->B or B->A.   
A<->B: Only the arrow on the B side shows. When an object goes across the configured 
line, both directions can be detected and alarms are triggered.   
A->B: Only the object crossing the configured line from the A side to the B side can be 
detected.   
B->A: Only the object crossing the configured line from the B side to the A side can be 
detected. 
2)  Drag the slider to set the detection sensitivity.   
Sensitivity: Range [1-100]. The higher the value is, the more easily the detection alarm can 
be triggered. 
3)  Click OK to save the rule settings and return to the line crossing detection settings 
interface.