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Tip

Video stream and scene requirements for the Crowd estimation VA

Image requirements for the Crowd estimation VA

Hardware requirements for neural analytics operation

To configure the Crowd estimation VATo create the detection tool, do the following:

  1. Go to the
    2. Detection Tools
  2. Detectors tab.

  3. Below the required camera, click Create… → Category: Retail → Crowd

    4. Estimation

  4. estimation VA.

By default, the detection tool detector is enabled and set to count crowds of people.

If necessary, you can change the settings of the detection tool detector parameters given in the table:

By default, the Decode key frames parameter is enabled. In this case only key frames are decoded. To disable the parameter, select the No value in the corresponding field.

This parameter reduces the load on the Server, but at the same time the detection quality decreases. We recommend enabling this parameter for "blind" (without video image display) Servers on which you want to perform detection.

For the MJPEG codec decoding isn’t relevant, as each frame is considered as a key frame.

The Number of frames processed per second and Decode key frames parameters are interrelated.

If a local Client isn’t connected to the Server, the following rules work for remote Clients:

  • If the key frame rate is less than the value specified in the Number of frames processed per second field, the detection tool will work by key frames.
    • If the key frame rate is greater than the value specified in the Number of frames processed per second field, the detection will be performed according to the set period.Mode the operation—CPU or NVIDIA GPU General information on configuring detection). Crowd Estimation VA .
  • Starting with Detector Pack 3.11, Intel HDDL and Intel NCS aren’t supported.
    • a triggerThe Estimation a trigger
    ParameterValueDescription
    Object features
    Record mask to archiveYesBy default, the recording of the mask to the archive is disabled. To record the sensitivity scale of the detection tool detector to the archive (see Displaying information from a detection tool detector (mask)), select the Yes value
    No
    Video streamMain streamIf the camera supports multistreaming, select the stream for which detection is needed
    Other
    EnableYesBy default, the detection tool detector is enabled. To disable, select the No value
    No
    NameCrowd Estimation estimation VAEnter the detection tool detector name or leave the default nameDecode key framesYes
    Note
    titleAttention!

    If a local Client is connected to the Server, the detection tool will always work according to the set period. After disconnecting the local Client, the above rules will be relevant again.

    No
    Decoder modeAuto

    Select a processing resource for decoding video.   When you select a GPU, a stand-alone graphics card takes priority (when decoding with NVIDIA Nvidia NVDEC chips). If there is no appropriate GPU, the decoding will use the Intel Quick Sync Video technology. Otherwise, CPU resources will be used for decoding

    CPU
    GPU
    HuaweiNPU
    Delayed start (s) (starting with Detector Pack 3.14)0

    Specify the time in seconds by which the detector start will be delayed after receiving the first frame. The delay will be applied randomly within the range from 0 to the specified value.

    The default value is 0, meaning the detector starts without delay.

    The optimal delay value depends on the configuration and the number of detectors. It is recommended to specify the delay value so that the number of seconds is not less than the number of detectors. The value must be in the range [0, 3600]

    Detection mode



    		CPU

    Select

    a processor for the

    operation (see

    Selecting Nvidia GPU when configuring detectors)

    Note
    titleAttention!

    If you specify other processing resource than the CPU, this device will carry the most of computing load. However, the CPU will also be used to run the

    detector.

    Nvidia GPU 0
    Nvidia GPU 1
    Nvidia GPU 2
    Nvidia GPU 3Nvidia GPU 0
    Number of alarm objects1

    Specify the number of objects that will trigger the detectionat which an event occurs. The value must be in the range [0; , 10000]

    Number of frames processed per second0.25017

    Specify the number of frames for the detection tool detector to process per second. The value must be in the range [0.016; , 100]

    Trigger upon count
    		Greater than or equal to threshold to threshold value

    Select when you want to generate

    events.

    The Crowd

    estimation VA will generate

    events from the threshold value set in the Number of alarm objects field

    Less than or equal to threshold value
    Change in readings
    TypeCrowd Estimation estimation VAName of the detection tool detector type (non-editable field)

    If necessary, in By default, the entire frame is the detection area. In the preview window, set you can specify the detection areas with using the help of anchor points points Image Modified (the same as with the excluded areas of the Scene analytics detection tools, see Setting General Zones for Scene analytics detection tools). By default, the whole frame is  (see Configuring a detection area).

    To save the parameters of the detection tooldetector, click the Apply  Image Modified button. To cancel the changes, click the Cancel Image Modified button.

    It is possible to display the sensor and the number of objects in the monitored area in the Surveillance window on the layout (see Displaying the number of detected objects).

    Image Modified