Configuring the Queue length detection module

To configure the Queue length detection module, use the settings panel of the Queue length detection object that is created on the basis of the Camera object on the Hardware tab of the System settings window.

To configure the Queue length detection module, do the following:

1. Go to the setting panel of the Queue length detection object.
   
2. Click the Settings button (1).
   The Detection settings window opens. 
   
3. Specify the area of interest and the approximate size of a person on the video image:
   1. Click the Stop video button to capture the frame of the video image (1).
   2. Click the Area of interest button (2).

   3. On the captured video frame (3), sequentially set the anchor points of the area using the left mouse button, the situation of which you want to analyze (1). You can add only one area. When you try to add the second area, the first one is deleted. After you add the area, the remaining part of the video image is darkened.

      Note

      To remove the area, click the button  next to the Area of interest button.

      

      Attention!

      Setting the Area of interest is the mandatory condition for the detector's operation.

   4. Click the Size of person button (2).

   5. On the captured video image (1), set the approximate size of a person. To do this, click the left mouse button and, by holding it, specify the rectangular area (1).

      Note

      To remove the person size, click the button next to the Size of person button.

      

4. Set the parameters of the module:
   1. Go to the Parameters tab (2).
   2. In the Detection sensitivity [0.0, 1.0] field, set the detector's sensitivity in conventional units in the range from 0 to 1 to two decimal places. The higher the sensitivity, the more "small" alarms are referred to the queue, that is, the algorithm starts to react to more inconsiderable motion. Hence, if you set the minimal sensitivity value, only considerable changes of the scene can be analyzed by the queue length detection.
      

   3. In the Periodicity of occupancy measurement (s) field, specify the time period in seconds for counting the number of people in the observed area. The minimum value of this parameter is the interval between frames of the analyzed video stream but cannot be less than one second, the maximum is 3600 seconds. The value of the parameter depends on the scene characteristics. For example, if the queue in the camera FOV doesn't change for a long time, the given parameter can be reasonably large. We don't recommend specifying the value of this parameter for more than 3-5 minutes for the correct operation of the algorithm on the average scene.

      Note

      The more often you measure the occupancy, the greater the load on the system.

   4. Set the Reduce large resolution checkbox to create and process the new frame consisting of even lines of the initial one when an ordinary frame appears.
   5. In the Queue size (person) field, enter the minimum queue size required for the detector to generate an event.

   6. In the Frames processed per second [0.016, 100] field, enter the number of frames per second that the detector processes. The higher the value, the more accurate the detector's operation, but the higher the load on the processor.

      Note

      You can find all events that are received from the Queue length detection object in the Event viewer interface window. For more details, see Obtaining traffic information in the area of interest.

5. Click the OK button to save the changes and return to the settings panel of the Queue length detection object.

   Note

   To return to the settings panel of the Queue length detection object without saving changes, click the Cancel button.

6. Click the Apply button on the settings panel of the Queue length detection object.

Configuring the Queue length detection module is complete.