Vehicle License Plate Recognition

Vehicle License Plate Recognition (VLPR) is a vital component in Intelligent Transportation Systems. VLPR also mainly represented as ANPR or ALPR. As of now in many developed nation, the Vehicle License Plate Recognition (LPR) system has been used in major areas like in Road safety, i.e. Traffic management, border security etc. implemented with very high end technology, but there are still studies being conducted on this area in many developing and under-developed countries, due to the different types of number plates being used in different countries based on some protocols. So there is need of different ANPR system for each country. This system can be helpful in the identification of any vehicle by reading its license plate number, so we

In India the general format for the license plate is two letters (for state code) followed by district code, then a four digit code specific to a particular vehicle. And here only two types of plate are used one is black color for number printing on white background which is used for private vehicles and the other is yellow background which is used for commercial vehicles, as per the traffic norms. Apart from the problems mentioned above, the other external factors that affect in the process of detection and extraction of the vehicle registration plate are due to poor image quality because of the presence of noise on the image, blurring in the image, uneven illumination, dim light, image perspective distortion, unsystematic and incline of plate frame, other disturbance characters or reflection on vehicle surface, and the color similarity between the license plate and the background vehicle body and foggy condition.

Identification of vehicle license plate is basically a five step process: (1) Image acquisition i.e. capturing the image of the license plate (2) pre-processing the image i.e. normalization, adjusting the brightness, skewness, and contrast of the image (3) localizing

and at sensitive area within the campus of government organization to avoid trespassing of any unauthorized vehicles and at state and central border for security purpose and in High way tool collection and parking fee collection at authorized public places. And in private sector VLPR has its application mainly in parking fee collection by calculating the duration of parking at the venue like shopping Malls etc. and in prevention of entrance of unauthorized vehicles and robbery of vehicles. In above mentioned areas the VLPR system based on a particular requirement it is equipped and developed and as application of this system varies the quality of it varies, i.e. the main component of VLPR system i.e. the camera may not have same resolution at parking slots at any private organization and at the camera used at border security because of external factors that affect in the image capture and the processing speed and output accuracy of the system also varies based on the input from the camera