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To configure the queue Queue detection tool, do the following:

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1. To record mask (highlighting of queues/linesthe queue on the video) to the archive (see Extra information overlay (Masks)), select Yes for the Record mask to archive corresponding parameter (1).
   
2. If a the camera supports multistreaming, select the stream for which detection is needed (2). Selecting a low-quality video stream allows reducing the load on the Server.
   

3. Set an the event transmission interval in seconds for sending the data to the AxxonData report subsystem (see Queue length report), if the queue length exceeds the set limit (3). Zero value means no transmission of eventsIf 0 value is selected, no events will be transmitted.

4. Select a processing resource for decoding video streams (4). When you select a GPU, a stand-alone graphics card takes priority (when decoding with Nvidia NVIDIA NVDEC chips). If there 's is no appropriate GPU, the decoding will use the Intel Quick Sync Video technology. Otherwise, CPU resources will be used for decoding.
5. By default, the frame is compressed during the analysis to the specified size

   Analyzed framed are scaled down to a specified resolution (5,

   default size is

   1920 pixels on the

   larger

   longer side).

   In this case, the following algorithm is used

   This is how it works:

   if the original resolution on the larger

   1. If the longer side of the

   frame is greater than the one

   1. source image exceeds the value specified in

   the 

   1. the Frame size change

    field

   1.  field,

   then

   1. it is divided

   in half;if

   1. by two.

   2. If the resulting resolution

   is less than

   1. falls below the specified

   one, then the algorithm stops and this resolution

   1. value, it is used

   ;

   1. further.

   if

   1. If the resulting resolution

   is

   1. still

   greater than

   1. exceeds the specified

   one

   1. limit,

   then

   1. it is divided

   in half until it becomes less

   1. by two, etc.

      Info
      title Note
      For example, the

   original video

   1. source image resolution is 2048*1536, and the

   specified

   1. specified value is set to 1000. In this case, the

   original

   1. source resolution will be halved

   2

   1. two times (512*384),

   because

   1. as after the first division, the

   value

   1. number of pixels on the

   larger

   1. longer side

   of the frame will be greater than the specified value

   1. exceeds the limit (1024 > 1000).

      
      

      Info
      title Note

   To avoid

   1. If detection

   errors

   1. is performed on

   streams with

   1. a higher resolution stream and detection errors occur, it is recommended

   that compression be reduced.Set the interval in seconds for sending events to the AxxonData reporting subsystem (see Queue length report) if the queue size exceeds the specified value (6). If the value is set to 0, then events will not be sent

   1. to reduce the compression.

      
      

6. Set the frame rate value for the detection tool to process per second (6). This value should be in the range [0.,016, ; 100].   The The higher the value of this parameter, the greater higher the CPU load.

7. Click the Image Added button and set the minimum size of a human (7). You can do so by dragging the anchor points of the rectangular area.

   Info
   title Note
   It is recommended to set the minimum size of a human graphically. The number in the Human size field is a conventional value.

   Image Added

8. Specify the number of people in the queue to trigger the alarm when exceeded (7above which the detection tool triggers (8). The value should be within in the range of [2; 20]. 
9. Specify the detection tool sensitivity in standard units from 0 to 1 (89). The higher the sensitivity, the smaller the disturbances analyzed by will be attribute to the queue detection algorithm. Alternatively, the lower the sensitivity, the greater changes in scene are processed by the queue detection tool, i.e. the algorithm will react to more insignificant movement. If you specify the lowest sensitivity value, the detection tool will process only significant changes in the scene.
   You should set the sensitivity value empirically based on the Motion Mask data displayed in the Preview preview window.
   Image RemovedImage Added
10. In the Preview preview window, you can set the detection zones areas with the help of the anchor points much like privacy masks in Scene Analytics (see Setting General Zones for Scene Analytics).
11. Click Image Removed and set the approximate size of a human. You can do so by dragging the corners of the rectangular area.

    Info
    title Note
    It is recommended to set the minimum size of a human graphically, the numbers in the Human size field are conditional values.

    Image RemovedClick ApplyApply button.

The queue Queue detection tool is now configured. When the detection tool is triggered, the following events are generated:

Camera "6. Camera". Detection "Queue detection" triggered, quauequeue (min.: 610, max.: 610)

where min. and max. is estimated queue length.