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Sony would like to point out to installers that if the indications contained in this guide are not respected, there may be a
significant impact on the system performance.
Sony would also like to point out to installers that a well-performing system can only be achieved on number plates which are:
Clean and in good condition.
•
Conform to the regulations.
•
However, although the system can be used on all types of plates, the performance is significantly reduced on:
The rear plates (because of the possible presence on the rear of the vehicle of elements which may hinder plate
•
localisation or recognition). This applies in particular to lorries.
Plates which, although conform to regulations, have small-sized characters (especially motorbike plates).
•
Plates which, although conform to regulations for old vehicles in certain countries, are not reflective to infrared (are
•
only read if there is enough natural or artificial illumination to compensate for the lack of response to the infra-red
illumination of the camera).
Plates which, although conform to regulations, contain atypical syntaxes (usually purchased by the owners of the
•
vehicles) with just three or four characters.
The system doesn't work in theses cases:
Square licence plates.
•
Non IR reflective license plates.
•
If all the number plates in the fleet do not entirely correspond to these criteria, regardless of the country concerned, a reading
result of 100% can never be attained.
Warnings
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