Image requirements for the Visitors counter

Video stream and scene requirements for the Visitors counter

Requirements for the operation of the Visitors counter are given in the table:

Object images

Image quality: image must be clear, without obvious defects from the compression algorithm

Allowable person size:
Person size is an area of the rectangle around a person as a percentage of the frame area. To correctly receive an event from the detector, you must select a person size in the range from the minimum value depending on the frame width up to 75% of the frame width.

Note

Frame width isn't the original resolution of the video image but the size of the frame based on the Frame size change parameter (see Configuring the Visitors counter).

The minimum size of a person, depending on the frame width, is given in the table:

Attention!

The minimum size of a person must not be considered optimal. If the actual size of a person in the frame is significantly larger than the minimum value, setting the minimum size doesn't guarantee the best detection quality. When you choose a value, consider the actual size of the person in the frame and the video resolution.

Minimum size of a person is the size below which the detector cannot be guaranteed to work correctly. This is a lower limit that depends on the frame resolution.
Optimal size of a person is the size at which the detector provides the most accurate results. You must select the value experimentally for a specific resolution and shooting conditions, and the value must not be smaller than the minimum.

Frame width, px	Minimum size of a person in %
320	18.8
360	16.7
384	15.7
400	15
426	14.1
512	11.8
640	9.4
800	7.5
832	7.3
854	7.1
960	6.3
1024	5.9
1120	5.4
1152	5.2
1280	4.7
1440	4.2
1600	3.8
1792	3.4
1856	3.3
1920	3.2
2048	3.0
2304	2.7
2560	2.4
2732	2.2
2800	2.2
3200	1.9
3840	1.6
4096	1.5
6400	1
8192	0.8

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Documentation for Axxon One 3.0/3.1 version. Documentation for Axxon One 2.0 version is also available.