The Study Of License Plate Recognition System Based On OpenCV And ARM

The car's license plate number is the only vehicle identification card,and for this special identification,making it plays a vital role in the license plate recognition system.This paper is mainly based on the latest computer vision OpenCV image processing library,and based in ARM embedded platform transplant,which including image acquisition and pre processing,license plate location,character segmentation,character recognition,embedded transplantation five parts key techniques,and use the library OpenCV programming code to achieve the license plate automatic recognition.After using the OpenCV corresponding image processing library to write code,through gray histogram statistics,and judge the value of the license plate image of the light and dark level,corresponding to make the pretreatment,in order to improve the image of the recognition.According to the geometric features of the license plate,using Sobel operator to carry out the vertical direction of the texture,operation on the image,and then located the license plate.After the use of template matching and projection method,a large number of characters are trained by BP neural network.Finally,the identification of the application program is transplanted to the ARM platform for verification.