Research And Implementation Of Vehicle License Plate Recognition Key Technology

With the development of economy and technology,and the improvement of people's living standard,the number of cars in our country is increasing rapidly.The most direct impact on the increase of the number of cars is the decline of the road traffic efficiency.In order to improve the efficiency of road traffic,a large number of research institutes and enterprises have developed a large number of road traffic management systems.The use of license plate recognition system is the most important function of vehicle monitoring system.The license plate recognition technology can effectively improve the city road traffic monitoring system for real-time monitoring and management of the vehicle.Application of license plate recognition technology in life is closely related the people's life and travel.And how to be more effective for fast and accurate recognition of the vehicle licenses,has now become the focus in the field of traffic and a hot topic.In this paper,on the basis of the vehicle license plate recognition technology,the vehicle license plate image preprocessing,license plate location,image segmentation and license plate character recognition are studied in four aspects.The main contents of this paper are as follows:In the study on pretreatment of license plate image,the image grayscale,image denoising,image enhancement,image binarization techniques were studied.Through the simulation of the vehicle license plate image preprocessing,license plate image quality can be significantly.In the study of license plate location of license plate image,the common method of license plate location is studied.The results of mathematical morphology and texture feature are compared,and the results show that the method based on texture feature is more accurate and effective.In the research of character segmentation of license plate image,the common character segmentation method is studied.Through the research and comparison of the character segmentation technology based on the connection area and projection method,the results show that the segmentation method based on projection has better segmentation effect.Finally,in the research of license plate character recognition,the commonly used character recognition technology is studied.Combined with the practical application of the license plate recognition time,the vehicle license plate recognition technology based on template matching is studied in detail.