A license plate location method based on projection method and svm in complex background

Abstract

The invention discloses a license plate locating method based on a projection method and an SVM under a complex background. The license plate locating method based on the projection method and the SVM under the complex background comprises the following steps that (1) a plurality of license plate samples are collected and an SVM characteristic vector is extracted and obtained; (2) collected license plate pictures are converted to an HSV color space and a brightness component graph is extracted; (3) perpendicular edge detection and binarization are conducted on the extracted brightness component graph so that a binarization image can be obtained; (4) horizontal projection analysis is conducted on the binarization image so that horizontal stripes of zones where the license plates are located can be determined; (5) the horizontal strip zones where the license plates are located are selected from the collected license plate pictures; (6) the horizontal strip zones are traversed through a detection window, SVM characteristic values of the horizontal strip zones in the detection window are extracted, license plate candidate zones are determined and combined, and therefore a license plate zone is obtained. The license plate locating method based on the projection method and the SVM under the complex background is suitable for locating the license plates in vehicle snapshot pictures with a high resolution ratio and the complex background and is high in locating efficiency and accurate in locating results.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a license plate location method based on a projection method and an SVM under a complex background. Background technique [0002] With the continuous rapid development of the economy, more and more cars have entered people's lives. The rapid increase in the number of vehicles has brought pressure and tests that cannot be underestimated to traffic management, and the Intelligent Transportation System (ITS) came into being under such circumstances. License plate is an important identity symbol of a car, so license plate recognition is a technology of great significance. [0003] The invention with authorized announcement number CN102262726B discloses a license plate recognition system based on FPGA multi-core, including at least five soft cores, all of which are mounted on the FPGA shared buffer, and data interaction is realized through the shared buffer. Command interacti...

AI Technical Summary

Problems solved by technology

[0005] The pictures taken by the capture machine on the road or at the checkpoint of the toll station generally have the characteristics of high resolution and complex background. For this type of picture, some traditional license plate positioning methods are either in terms of accuracy or real-time performance. Unable to achieve satisfactory results

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