Line Crossing Detection

Line crossing detection detects people, vehicles, and objects crossing a set virtual line. The detection direction can be set as bidirectional, from left to right or from right to left.

1. Go to Smart Analysis > Smart Event Settings > Perimeter Protection.
2. Select a camera.
3. Click Line Crossing.
   Figure 1 Line Crossing Detection
4. Check Enable Line Crossing Detection.
5. Optional: Check Save VCA Picture to save the captured pictures of line crossing detection.
6. Set the line crossing detection rules and detection areas.
   1. Select an arming area.
   2. Select Direction as A<->B, A->B, or A<-B.

      A<->B

      Only the arrow on the B side shows. When an object goes across the configured line with 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.

   3. Set the detection sensitivity. The higher the value is, the more easily the detection alarm can be triggered.
   4. Click Draw Region.
   5. Draw a virtual line in the preview window.
7. Optional: Draw the maximum size/minimum size for targets.
   Note:

   Only the targets in the size ranging from maximum size to minimum size will trigger line crossing detection.

   1. Click Max. Size/Min. Size.
   2. Draw an area in preview window.
   3. Click Stop Drawing.
8. Optional: Select Detection Target as Human or Vehicle to discard alarms which are not triggered by human body or vehicle.
9. Set the arming schedule. Refer to Configure Arming Schedule.
10. Set linkage actions. Refer to Configure Linkage Actions.
11. Click Apply.