NVR User Manual 061220NA 108
4. Set the VCA detection type to Line Crossing Detection.
5. Check the Enable checkbox to enable this function.
6. Click to configure the trigger channel, arming schedule, and linkage actions for the line crossing
detection alarm.
7. Click the Rule Settings button to set the line crossing detection rules.
1) Set the direction to A<->B, A->B, or A<-B.
• A<->B: Only the arrow on the B side shows; an object going across the configured line in either
direction will be detected and trigger an alarm.
• A->B: Only an object crossing the configured line from the A side to the B side will be detected.
• B->A: Only an object crossing the configured line from the B side to the A side will be detected.
2) Click-and-drag the slider to set the detection sensitivity.
• Sensitivity: Range [1−100]. The higher the value, the more easily the detection alarm can be
triggered.
3) Click OK to save the rule settings and go back to the line crossing detection settings interface.
Figure 155, Set Line Crossing Detection Rules
8. Click and set two points in the preview window to draw a virtual line.
9. (Optional) Use the to clear the existing virtual line and re-draw it.
NOTE: Up to four rules can be configured.
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