High Security Number Plate Recognition System with Different Filtering Techniques for Image Enhancement

High Security Number Plate Recognition could be used to automatically open a gate or barrier into a secured area for authorised members. This could replace or assist security guard at the gate or barriers of premises. If a vehicle is stolen, it could be marked in the Number plate recognition system as so if any point the stolen vehicle happens to pass a camera on the road side that belongs to the license plate recognition system, an alarm is set off to alert a guard. To control the Traffic Flow Management, Automatic Number Plate Recognition is very popular in tracking trespass vehicles, which are breach the speed rule on highway or use illegal bus lane. Each highway follows the specific speed. If any vehicle violates that speed limit the camera capture the image of that vehicle with license plate. In this paper frequency domain filter, maxican hat operator filtering and spatial filter are used for the image enhancement.