The Research And Application Of Vehicle Plate System

The vehicle plate intelligent recognition in the modern traffic surveillance and controlis one of the hot key in the field of modern traffic engineering studies, but also modern andintelligent traffic management to achieve an important prerequisite. As coming along withthe development of the society and traffic,our country’s traffic develop quickly.Theadvanced vehicle plate intelligent recognition system can be widely used in trafficdiction,can accomplish traffic control and scientific induction,at districts,ports and airportscan accomplish the scientific management,the illegal vehicles scientific monitoring, thevehicles anti-theft management,in those ancillary fields,its application future is verywidely.So the research and application of vehicle plate system is proposed.Firstly,the designing technology of the vehicle plate system is described. Thefrequency domain analysis method,which bases DFT translation,the plate locationmethod,which bases binaryzation,the plate characters’ cutting apart method,which basesHough analysis,the projection method,which bases plate characters’ characteristic,whichprovides technical support to vehicle plate recognition.Secondly, the light interference,the plate biasd and noise are analyzed, points out thatthe plate image pre-processing is the effective method of solving the noise interference. Thecollecting image facilities’s position’s adjusting, the color image’s gray management, thegray image’s enhance, the plate image’s edge detecting is described.Thirdly,basing the plate image’s pre-processing,the plate location and recognitionalgorithm is proposed. Basing the plate’s shape, gray’s distribution characteristic come tothe plate detecting. The binaryzation plate image come to edge exploration,aftermanagement,apply rectangular match method, basing the distribution image of the jumpon the white-point, accomplish the plate rough location and under conditions of top andbottom of the search, according to aspect ratio search for information about the brink ofexpansion after the license plate accurate positioning cutting.Finally, The application of the plate location and recognition algorithm,finishing thethe plate characters’ division and recognition. The character’s division of projection method of binaryzation image,the character’s division of vertical projection method.In thecharacters’ recognition vehicle, use the BP network method.