License plate locating method and device

Abstract

The invention discloses a license plate locating method and device. The method includes: carrying out pre-detection to determine a candidate license plate region; selecting proposal sampling status, which corresponds to proposal distribution, in the candidate license plate region; calculating license plate feature probability of the proposal sampling status according to a color feature, a shape feature and a character feature of a sampling region corresponding to the proposal sampling status; according to the obtained license plate feature probability, determining whether the proposal samplingstatus is added into a sampling status set; returning to repeated execution of the step, of selecting proposal sampling status, which corresponds to the proposal distribution, in the candidate license plate region, to acquire a sampling status set; and determining that a sampling region corresponding to sampling status of highest license plate feature probability in the sampling status set is a license plate location region. According to the method, the license plate region can be presented by using the maximum posterior probability of the image appearance features, design of a proposal probability distribution function is coordinated, a Markov Chain Monte Carlo (MCMC) method is adopted, a calculation process is enabled to be fast and effective, and the purpose of precise locating is achieved.

Description

technical field [0001] The invention relates to the field of intelligent transportation, in particular to a method and device for locating a license plate. Background technique [0002] In recent years, with the rapid development of computer and Internet technology, the number of various motor vehicles has increased rapidly, and various types of information, including traffic-related information, have shown an explosive growth trend. In order to manage these information more safely and efficiently, Intelligent Transportation System (Intelligence Transportation System) came into being. Intelligent transportation system is the effective integration and application of advanced information technology, computer technology, data communication technology, electronic control technology, artificial intelligence technology, etc. , Efficient ground transportation system. Intelligent transportation systems play a huge role in traffic management, traveler information, bus operation, ve...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there is no implementation scheme for accurate license plate positioning. Therefore, how to accurately locate the license plate has become a technical problem to be solved urgently.

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