Configuring the «Queue length detection» module

The Queue length detection module can be configured using the System settings menu, under the Hardware tab, on the Queue Length Detection control panel, using the Camera settings.

The Queue length detection module is set up as follows:

1. Go to the Queue Length Detection control panel.
   
2. Click Settings.
   The Detection settings window will appear.
   
3. Specify the area of interest and the approximate size of people in the video image:
   1. Click Stop video to capture the video image (1).
   2. Click Area of interest (2).

   3. Using the left mouse button select the four corners of the area on the captured video image (3) to be analyzed (1). Only one area may be so designated. If a second area is specified, then the first area will be deleted. Upon selection of the area the remaining part of the video image will be dimmed.

      Note.

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

      

   4. Click Size of man (2).

   5. On the captured video image (1) specify the approximate size of a person. To do this use the left mouse button to specify a rectangular area (1).

      Note.

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

      

4. Set the module parameters:
   1. Go to the Parameters tab (2).
   2. Set the detection sensitivity field in a range from 0 to 1 with up to two decimal places (1). The higher sensitivity, the less perturbations will be considered as a queue. i.e. the algorithm will react to more inconsiderable motion. So, only considerable change od scene will be analyzed by the queue length detection if the minimum value of the detection sensitivity is specified.
      

   3. In the Periodicity of employment measuring, s field, enter a time period in seconds for counting the number of persons in the observed area (2). Minimum value of this parameter is an interval between frames of analyzed video stream, but not less than 1 second and not more than 3600 seconds. Value of the parameter depends on scene characteristics. For example, if a queue in the field of video camera view is not changing for a long time, than the parameter value can be reasonably large. It is not recommended to specify value of this parameter more than 3-5 minuts for correct working of algorithm on the average scene.

      Note.

      The more frequently employment measurings, the more frames are analyzed by algorithm and the higher the system capacity.

   4. Set the Reduce large resolution checkbox to create and process the new frame consist of even lines of initial frame (3).
   5. In the Generate employment event, h field enter the value of the Queue length detection counter (number of persons) to generate the OCCUPANCY_EVENT event when it is exceeded (4). This event comes from Camera and Queue length detection objects. The event have the following parameters: current counter value (occupancy<>) and the threshold value (raise_count<>). The events can be used in scripts and programs (please refer to Programming Guide (JScript) and Programming Guide for more info on scripts and programs; the most relevant versions of these documents can be found in AxxonSoft documentation repository).

5. Click OK to save changes and return to the control panel of the Queue length detection (5).

   Note.

   To return to the control panel of the Queue length detection without saving changes, click Cancel (6).

6. On the Queue length detection control panel, click Apply.

Configuring the Queue length detection module is complete.