Documentation for Axxon One 2.0. Documentation for other versions of Axxon One is available too.

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Hardware requirements for neural analytics operation

Video stream and scene requirements for the Line crossing VI detector

Image requirements for the Line crossing VI detector

Licensing of the software module for the Line crossing VI detector in Windows OS

Licensing of the software module for the Motion in area detector VI in Linux OS

To configure the Line crossing VI detector, do the following:

  1. Go to the Detection Tools tab.

  2. Below the required camera, click Create… → Category: Trackers → Line crossing VI.

By default, the detection tool is enabled and set to generate events when an object crosses the virtual line in any direction.

If necessary, you can change the detection tool parameters. The list of parameters is given in the table:

ParameterValueDescription
Object features
Record objects trackingYesThe metadata of the video stream is recorded to the database by default. To disable the parameter, select the No value
No
Video streamMain streamIf the camera supports multistreaming, select the stream for which detection is needed
Other
EnableYesBy default, the detection tool is enabled. To disable, select the No value
No
NameLine crossing VIEnter the detection tool name or leave the default name
Background accumulationYes

By default, scene background accumulation is enabled. To disable, select the No value

No
Decoder modeAutoSelect 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 modeCPUSelect 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 sensitivity level of the detector as a percentage for detecting moving objects in the analyzed direction. The higher the sensitivity value, the less noticeable the moving object can be detected. The value must be in the range [0, 100]

Frame size change640Specify the size to which the video is compressed before analysis. The value must be in the range [480, 960]
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]
Number of execution threads4Specify the number of execution threads. The value must be in the range [0, 100]
Number of frames processed per second12

Specify the number of frames processed per second. Value should be in range [0.016, 100]

Attention!

The detector operates optimally with the default value for most use cases. Changing this value may reduce the detector's performance quality.

Saving backgroundYes

By default, saving the scene background is enabled. To disable, select the No value

Attention!

Background files are automatically saved to the directory C:\ProgramData\VideoIntellect\. The size of this folder can quickly increase, potentially filling up all available space on the C drive. It is not possible to set a limit on the maximum volume of this directory, so it’s important to periodically check its contents and clear it if necessary.

No
State saving interval0Specify the state saving interval in seconds. The value must be in the range [0, 9999]
TypeLine crossing VIName of the detection tool type (non-editable field)

To save the parameters of the detection tool, click the Apply  button. To cancel the changes, click the Cancel  button.

The Line crossing VI detector is configured.

Configuring virtual line

By default, the detector is configured to generate events when an object crosses a virtual line in any direction. To configure a virtual line, do the following:

  1. In the preview window:
    1. Specify the end points of the line :

      ActionResult
      Hover the cursor over the end point and, holding down the left mouse button, move the mouseMoving the end point of a line
      Hover the cursor over the line and, holding down the left mouse button, move the mouseMoving the line
    2. By default, both directions of object movement through the line are detected. To stop the detection in the required direction, click the button corresponding to this direction.

      Attention!

      • You must select at least one direction for detection.
      • An unmonitored direction of object movement is indicated by a dimmed arrow.
  2. If necessary, you can add additional virtual lines at any location in the preview window.

    Note

    • Additional virtual lines are created single-directional by default. To enable the second direction, click the button next to the corresponding direction line.
    • The end points are connected by a two-color dashed line. The directions of object movement through the line are indicated by dotted arrows.
    • For convenience of configuration, you can "freeze" the frame. Click the  button. To cancel the action, click this button again.
    • To hide the virtual line, click the button. To cancel the action, click this button again.
    • To delete a virtual line, click the button.
  3. Click Apply .

The virtual line configuration is complete.

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