(see Configuring a detection area).
To configure the Motion in area detector VI, do the following:
Below the required camera, click Create… → Category: Trackers → Motion in area detector VI.
By default, the detection tool is enabled and set to generate events when an object starts moving within the specified area.
If necessary, you can change the detection tool parameters. The list of parameters is given in the table:
| Parameter | Value | Description | |
|---|---|---|---|
| Object features | |||
| Record objects tracking | Yes | The metadata of the video stream is recorded to the database by default. To disable the parameter, select the No 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 | Motion in area detector VI | Enter the detection tool name or leave the default name | |
| Background accumulation | Yes | By default, scene background accumulation is enabled. To disable, select the No value | |
| No | |||
| Decoder mode | Auto | Select a processing resource for decoding video streams. 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 | |||
| Detection mode | CPU | Select the processor for the detection tool operation (see Selecting Nvidia GPU when configuring detectors) | |
| Nvidia GPU 0 | |||
| Nvidia GPU 1 | |||
| Nvidia GPU 2 | |||
| Nvidia GPU 3 | |||
| Detection sensitivity (%) | 10 | Specify the detection tool sensitivity level as a percentage of detected moving objects within the specified area. The higher the sensitivity value, the more subtle the movement that can be detected. The value must be in the range [0, 100] | |
| Frame size change | 640 | Specify the size to which the video is compressed before analysis. The value must be in the range [480, 960] | |
| Head size | 50 | Specify the size of a person's head in the frame. The value should be given as a percentage of the frame's vertical side and must be in the range [1, 100] | |
| Ignore time (sec) | 0 | Specify the time interval in seconds during which events won't be processed after successful detection. The value must be in the range [0, 9999] | |
| Initiate event after (sec) | 5 | Specify in seconds, in what time interval the event should be generated after it begins. The value must be in the range [0, 9999] | |
| Minimum number of objects | 0 | Specify the minimum number of objects required to trigger the detection tool. The value must be in the range [0, 20] | |
| Minimum threshold (%) | 30 | Specify the minimum threshold percentage at which an event is created. The value must be in the range [0, 100] | |
| Number of execution threads | 4 | Specify the number of execution threads. The value must be in the range [0, 100] | |
| Number of frames processed per second | 12 | Specify the number of frames processed per second. Value should be in range [0.016, 100]
| |
| Saving background | Yes | By default, saving the scene background is enabled. To disable, select the No value
| |
| No | |||
| State saving interval | 0 | Specify the state saving interval in seconds. The value must be in the range [0, 9999] | |
| Type | Motion in area detector VI | Name of the detection tool type (non-editable field) | |
In the preview window, you can specify the detection areas using the anchor points (see Configuring a detection area).
|
To save the parameters of the detection tool, click the Apply 
button. To cancel the changes, click the Cancel 
button.
button. To cancel the action, click this button again.
button (see