The following table contains the requirements for cameras to enable the effective operation of the Visitors visitor counter:
:resolution- Resolution: 720 х 576 (CIF4) or 360 х 288 (CIF1) pixel resolution. Using pixel resolutions higher than CIF4 do not lead to higher recognition accuracy
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;frames ;color- Color: color camera is obligatory
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;no - No camera jitter is allowed.
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Illumination: |
best - Best recognition results are achieved under moderate illumination. If the scene is under- or over-illuminated, the recognition accuracy may drop down
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;sharp - Sharp changes in illumination may lead to improper operation of analytics.
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Scene and viewing angle: |
vertically - Vertically downward position is the best for the purpose. The closer to vertical, the more accurate counting
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;camera - Camera FOV dimensions: min. 2 x 2m, optimal 4 x 4m
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;the - The background must be primarily static and not undergo sudden changes
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;the - The counting area must not contain any moving objects except for humans
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;reflective - Reflective surfaces and harsh shadows from moving objects can affect the quality of analytics
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;leafage- Leafage, TV screens or any periodic object movement in the background may cause analytics glitches
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;if - If possible, avoid obstruction of the humans by static objects such as pillars, trees, etc.
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Images of objects within the scene: |
image - Image quality: the image must be clear and sharp with no visible compression artifacts
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;the - The allowable size of a person is described in
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the the - The visitors must not move in a continuous flow; smaller groups of humans are counted correctly.
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