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1. Go to the Prohibited direction motion detection tab.
   
2. In the Sensitivity (1-100) field, specify as a percentage in the range 0-100 the sensitivity of the detection tool to detecting moving objects in the detection zone. The higher the sensitivity, the less noticeable object can be detected. The default value is 50. If you select the Area mode in the Mode parameter, this setting is disabled.

3. In the Intensity [1, 50] field, specify in arbitrary units in the range 1–50 how noticeable the object's movement in the detection zone must be for the detection tool to trigger. The default value is 10. If you select the Line mode in the Mode parameter, this setting is disabled.

4. In the Duration [1, 100] field, specify in arbitrary units in the range 1–100 the duration of the object’s movement in the prohibited direction. It can be used when analyzing dense passenger flows, when an object making its way in the opposite direction appears in the camera’s FOV only for short time intervals, and the rest of the time is hidden from view by the crowd. The default value is 40. If you select the Line mode in the Mode parameter, this setting is disabled.

5. In the Head size [0, 1] field, specify in the range 0–1 what part of the video image height is the human head. The default value is 0.50. If you select the Line mode in the Mode parameter, this setting is disabled.
6. In the Allowable deviation angle [0, 180] field, specify in degrees in the range 0–180 the permissible deviation from the direction of movement specified by the red arrow in the prohibited direction. The default value is 45. If you select the Line mode in the Mode parameter, this setting is disabled.
7. In the Mode parameter, select Line if detection zone is determined by lines. The Area mode is selected by default—detection zone is determined by a polygon. The display of the Select area tab depends on the selected mode.
   

   Info
   title Note
   When you change the mode, all settings return to default values on the Select area tab.

8. Set the Background loading checkbox to load the background of the video image; by default, the checkbox is clear.
9. Set the Background saving checkbox to save the background of the video image for the period of time specified in the Background saving period field. By default, the checkbox is clear.
10. In the Background saving period field, specify the period of time in seconds during which the background of the video image is saved. The default value is 0.
11. In the Number of analytics streams field, specify the number of video streams that are used for neural network analytics. The default value is 4.
12. To save the detection tool settings, click OK.
13. Click the OK button to save the settings.

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