29/04/2022
xROBOPCZ22 & xROBOPMZ50
9
Camera Positioning
This section describes some important information with regards to camera positioning, the field of
view as determined by lens choice and angle of view. Some guidance follows advising how to
improve performance.
5.1 Lighting
As ambient lighting is not sufficient for number plate recognition at dawn, dusk or night-time, the
camera is equipped with built in Infra-Red (IR) LEDs.
Modern number plates are designed to be highly reflective so the IR light can take advantage of
this fact at these times.
5.2 Field of View and Lens Positioning
A lens should be selected that results in a well cropped image eliminating unnecessary areas
either side of the target vehicle, this will result in a larger more detailed view of the vehicle.
The following image shows a very wide field of view across a gateway, the RoboPlate cameras
cannot recognise a number plate from this image because it is too small.
