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In the scanning mode, the frame is divided into an arbitrary number of scanning windows for detection accuracy.

Scanning windows are parts of the frame that are analyzed separately and all together at the same time. Each scanning window analyzes a different part of the frame and detects events in itScanning windows allow the detection tool to receive more events, which improves the accuracy of detecting distant or small objects that might otherwise be missed.

Scanning mode is available for the fire and smoke detection, pose detection, Neurocounter, Neurotracker.

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You can configure the scanning mode using the parameters of the corresponding detection tool. The list of required parameters and their values are presented in the table below.

ParameterValueDescription
Scanning windowYesSelect the Yes value to enable the scanning mode
No
Scanning window heightNumeric value (in pixels)

The height and width of the scanning window are determined according to the actual size of the frame and the required number of windows.

For example, the real frame size is 1920×1080 pixels. To divide the frame into four equal windows, set the width of the scanning window to 960 pixels and the height to 540 pixels

Scanning window width
Scanning window step height

The scanning step determines the relative offset of the windows. If the step is equal to the height and width of the scanning window respectively, the segments will line up one after another. 

Reducing the height or width of the scanning step will increase the number of windows due to their overlapping each other with an offset. This will increase the detection accuracy, but will also increase the CPU load

. Decreasing the step below the height or width of scanning will cause the segments to overlap, while increasing the step can cause the detection tool to malfunction

Note
titleAttention!

The height and width of the scanning step should not be greater than the height and width of the scanning window—the detection tool will not operate with such settings.


Scanning window step width

Recommendations for configuring the scanning mode

  1. Set the same values for the window height and scanning step, as well as the window width and scanning step.
  2. Set the optimal number of scanning windows—from four to eight. The number of windows will depend on specific purposes, quality of the original frame, capabilities of devices. If the original frame is of low quality or small size, a large number of windows won’t increase the detection accuracy, but can lead to false alarms or no detection. You must select the number of scanning windows experimentally.
  3. If you didn’t get the detection tool responses at the same values of window and step, you must experimentally reduce the scanning steps relative to the height or width.

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