GeoVision LPR - Manual (Page 5)

The plate size is too small:
Example
Try to:
Zoom in the camera or reduce the distance between the camera and the
vehicle. You should capture and fill the image with a full width of vehicle.
The plate size is too big:
Example
Try to:
Zoom out the camera or enlarge the distance between the camera and
the vehicle. You should capture and fill the image with a full width of
vehicle.