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Automatic license plate recognition system is an important issue in intelligent transportation , the future inevitable trend of development of traffic management systems . This paper presents a new license plate recognition system , its mobility , small size , light weight , low power consumption advantages . Fixed license plate recognition method and existing GPRS wireless network technology based on the new ARM embedded technology , image acquisition, image transmission , and character recognition , automatic identification of the license . Next-bit machine hardware , first the functionality required by the system , the use of embedded systems can be customized features , design a microcontroller S3C2410 ( ARM9 core) as the core of the control of the embedded image acquisition system hardware circuit , including power circuit design, the design of the clock circuit , the circuit design of the storage system , the image acquisition circuit , an image display circuit and a communication interface circuit design . Layered driver based on Windows CE interface and flow driving principle in software design, the USB interface camera driver and image acquisition , and image data transmission using GPRS network and Ethernet connection . Host computer , the Windows application Sockets socket to receive image data , image processing and image data collected . , Described in detail from the original image to the final character recognition methods and algorithms used in image processing . License graying, gray stretch, image filtering , edge detection, the rough location of the license plate , license plate fine positioning , character segmentation , character recognition , and eventually got the car license number . The use of the obtained identification result as compared with the database parameters , and ultimately return the corresponding vehicle information to the next crew staff .
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