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EINAR
Installation
Guide
Adaptive Recognition
America
Adaptive Recognition
Hungary
Adaptive Recognition
Nordic
Adaptive Recognition
Singapore
WWW.ADAPTIVERECOGNITION.COM
3.
RECOMMENDED INSTALLATION SCENARIOS
A good ANPR engine can read the plates from images taken in various conditions. However, if you
want to achieve over 95% recognition rate with short recognition times, you have to calculate the
position of the camera accurately. The best position is if the angle between the camera axis and the
direction of the vehicle movement is minimal and the camera should be installed 1
–
1,5 meters above
the headlights of the vehicles.
The distance between the camera and plate is also important. If the camera is too far from the plate,
the characters may not be large enough for recognizing them. In this case, zoom-in until you reach the
proper size. If the distance is too short it may happen that a part of the plate is over the camera’s field
of view (when the vehicle is near to the side of the lane or the plate is not at the middle of the vehicle).
Try to adjust the direction of the camera so that the number plates are horizontal in the picture!
From the point of ANPR/LPR the most important is the size of the characters on the image. It is
recommended to have at least 25-pixel average character height. The too large characters are also
not suitable for ANPR, therefore try to avoid settings where the character size is greater than 50 pixels
in height.
For more information, check
Also check Einar User Manual on page
Einar ANPR Camera for Access Control & Parking - Adaptive
where additional installation tips can be found.
