(see Configuring the Detection Zone).
To create the detection tool, do the following:
Below the required camera, click Create… → Category: Retail → Crowd Estimation VA.
By default, the detection tool is enabled and set to count crowds of people.
If necessary, you can change the settings of the detection tool parameters given in the table:
| Parameter | Value | Description | |
|---|---|---|---|
| Object features | |||
| Record mask to archive | Yes | By default, the recording of the mask to the archive is disabled. To record the sensitivity scale of the detection tool to the archive (see Displaying information from a detection tool (mask)), select the Yes value | |
| No | |||
| Video stream | Main stream | If the camera supports multistreaming, select the stream for which detection is needed | |
| Other | |||
| Enable | Yes | By default, the detection tool is enabled. To disable, select the No value | |
| No | |||
| Name | Crowd Estimation VA | Enter the detection tool name or leave the default name | |
| Decoder mode | Auto | Select a processing resource for decoding video. When you select a GPU, a stand-alone graphics card takes priority (when decoding with 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 | |||
| Mode | CPU | Select the processor for the operation—CPU or NVIDIA GPU (see Selecting Nvidia GPU when configuring detection tools).
| |
| Nvidia GPU 0 | |||
| Nvidia GPU 1 | |||
| Nvidia GPU 2 | |||
| Nvidia GPU 3 | |||
| Number of alarm objects | 1 | Specify the number of objects at which an event occurs. The value must be in the range [0; 10000] | |
| Number of frames processed per second | 0.1 | Specify the number of frames for the detection tool to process per second. The value must be in the range [0.016; 100] | |
| Trigger upon count | Greater than or equal to threshold value | Select when you want to generate an event. 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 | |||
| Type | Crowd Estimation VA | Name of the detection tool type (non-editable field) | |
By default, the entire frame is the detection area. In the preview window, you can specify the detection areas using the anchor points (see Configuring the Detection Zone).
To save the parameters of the detection tool, click the Apply 
button. To cancel the changes, click the Cancel 
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).
