n
OK
Normal state.
n
Covered
One or both cameras covered, e.g. by a sticker.
n
Too dark
Illumination is too low for proper function or both cameras are
completely covered and shown a black image.
n
Too bright
more hypothetical,
because direct sunlight and reflexions from sunlight do not
cause "too bright"
The device did not stop counting in case of these errors. These
values could help in maintenance issues and is also available in
protocols to validate data.
The HDR cameras of the device cover the full range from weak
streetlight to bright sunlight without significant impact on the per-
formance. The interior illumination of public transit vehicles is suffi-
cient during night time.
However, as the cameras work in the visible light spectrum, the
device is not suitable for people detection in complete darkness.
Examples of the illuminance provided under various condi-
tions
Surfaces illuminated by
Illuminance
Candle, distance 1 m
1 lx
Streetlights
10 lx
Platform
50 lx
Lobby
100 lx
Arrival and departure lounge
200 lx
Office, check-in counter
500 lx
Clouded winter day
3,500 lx
Clouded summer day
20,000 lx
Sunny summer day
100,000 lx
The privacy image is an artificial calculated image of the empty
scenery. The image is without any persons or temporary objects.
Illumination
Privacy image
Structure and function
Functionality
09.06.2017
15
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Summary of Contents for APS-R
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