2N SELEA iZero, User Manual

Page: 30 / 51

30 / 51
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Display
It groups those number plate reading parameters dealing with how the number plates will be presented to the observer.
A
This functions facilitates the calibration
of the optical assembly by inserting near
the read number plate the height in pixels
of the character and the focusing at the
furthest point of the capture. To ensure
optimal reading, the minimum character
height must be at least 20 pixels. It will also
be possible to ascertain that the focusing
of the number plate is as good as possible.
For this, it will be necessary to adjust the
ring nut of the optical assembly to the
highest possible focus value. To facilitate
the procedure, during the rotation the highest captured value will be displayed in brackets for a few instants.
B
It rotates the video capture by 180° in order to meet some installation needs, such as ceiling assembly.
Exposure
It can be used to adjust the parameters of the built-in high-speed sensor. It includes two automatic gain and exposure time
adjustment modes, in order to help obtain an appropriate capture of the number plate in any external lighting conditions.
The default parameters are optimised at the factory, and as a rule should not be changed unless recommended by
Selea
technical support service.
A Triple exposure:
mode expressly devised by Selea to ensure the reading of number plates in any lighting conditions,
including extreme (backlighting, sun reflecting on the number plate, etc...). It has a slight negative effect on the speed
of the Live stream displayed. It adjusts
the parameters of the sensor for the
optimisation of the visibility of the number
plate, overlooking the rest of the frame. To
ensure optimum capture, reading trials are
carried out with 3 different positions.
B Automatic exposure:
useful during the
installation in order to assess framing.
However, it does not guarantee optimum
number plate reading in all conditions.
Using the target field, it is possible to
adjust brightness in the absence of
number plates.
C Fixed exposure: the exposure remains unchanged and set on the user’s values.
Illuminator
It is important to remember that the
iZero
built-in high-speed optical sensor is an infrared sensor with visible light filtering
optics. Therefore, in order to obtain visible images, the framed area must be sufficiently illuminated by infrared rays.
From the above, it is easy to understand that in order to ensure the correct operation of
iZero the built-in light should never
be switched off unless internal tests are being
completed, or in case of out-of-range installation
requiring additional IR light.
A
Enable the function
B
Modifiable values