8.4.2.6 Line Crossing

Line Crossing detection is designed to work in most indoor and outdoor environment. An event will be triggered every time when the camera detects objects crossing a defined virtual line.

Settings steps are shown as follows:

[Detection Settings]

Step1: Selected effective region including Normal and Advanced;

Normal mode is effective for all detection areas;

Advanced methods will work in specific fields of view and require setting a preset.

Step2: Select detection line, enable line crossing detection and define its direction;

Note:
  • Allows to set up to four lines at a time. There are three direction modes to choose for triggering alarm. “A→B” means when there is any object crossing the line from the “A” side to the “B” side, the alarm will be triggered. “B→A” vice versa. “A ↔ B” means that the alarm will be triggered when objects cross line from either side.

Step3: Choose detection object. Check Human or Vehicle attribute, and the camera will alarm once detecting people or vehicle and triggering related events.

[General Settings]

Step4: Set detecting sensitivity and object size limits.

Table 1. Description of the buttons
Parameters Function Introduction
Sensitivity Level 1~10 are available, the default level is 5. The higher the sensitivity, the easier it is for moving objects to be recorded in the results.
Trigger Mode Set the desired mode of the trigger logic including General Mode and Bottom Mode.

General Mode: The alarm is triggered when the object's body roughly enters the detection area.

Bottom Mode: the alarm will be triggered as soon as the bottom of the object enters the detection area. Suitable for scenarios that require sensitivity to intrusion status/bottom detection preference.
Min. Size

Draw the screen to set the minimum size of the detected object. When the object is smaller than this size, it will not be detected. The default minimum size is 3*3.
Max. Size

Draw the screen to set the maximum size of the detected object. When the object is larger than this size, it will not be detected. The default maximum size is 320*240.

[Schedule Settings]

Step5: Set detection schedule;



Note: This part is the same as the regular schedule settings. You can refer to 8.0.4.2.2 Region Entrance..
[Alarm Action]

Step6: Set alarm action.



Note:
  • This part is the same as the regular alarm settings. You can refer to 8.4.2.1 Intrusion Detection.
  • If you enable External Output and choose Constant External Output Action Time, when objects cross a defined virtual line, External Output Action alarm time will be always constant till the alarm is released