License plate type recognition method and system based on multi-feature fusion

Abstract

The present application provides a license plate type recognition method based on multi-feature fusion. The method comprises the steps of: acquiring a coarsely detected and filtered license plate image; calculating a block LBP feature of the license plate image; calculating an extended HOG feature of the license plate image; calculating a color histogram feature of the license plate image; fusing the calculated block LBP feature, extended HOG feature and color histogram feature of the license plate image; and performing license plate type recognition according to the fused feature of the license plate image to determine the type of a license plate. According to the license plate type recognition method and system based on the multi-feature fusion, provided by the present application, the calculated different features are fused and then the license plate type recognition is performed according to the fused feature, so that the advantage of performing the license plate type recognition according to each feature individually is integrated, the recognition effect is relatively robust due to the use of multiple features, and very high resistance to changes of light and angles is achieved.

Description

technical field [0001] This application relates to the field of license plate recognition, in particular to a method and system for license plate category recognition based on multi-feature fusion. Background technique [0002] With the development of technology, people have higher and higher requirements for license plate recognition. [0003] The current main license plate types include: ordinary blue plate, ordinary yellow plate, ordinary black plate (Hong Kong and Macau plate), new military plate, double-layer new military plate, new-style armed police license plate, double-layer new armed police license plate, police plate, embassy plate, etc. [0004] Most current license plate type recognition methods mainly include the following methods: (1) use color to identify license plate types, such as using the HIS color model, and set corresponding thresholds for each color component to distinguish common blue and yellow plates and For military and police license plates, thi...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in this application is to provide a license plate type recognition method and system based on multi-feature fusion, which solves the problem of only extracting single-type features in the prior art, and then performing license plate type recognition based on single-type features, resulting in license plate types. Problems with poor recognition

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