Vehicle registration extract method in complicated background based on wavelet transforming

A complex background, wavelet transform technology, applied in image data processing, instrument, character and pattern recognition, etc., can solve problems such as poor method robustness, performance degradation of license plate recognition systems, and lack of adaptability.

Inactive Publication Date: 2007-10-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Once the environment changes, its extraction accuracy will fluctuate greatly, which will degrade the performance of the...

Method used

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  • Vehicle registration extract method in complicated background based on wavelet transforming
  • Vehicle registration extract method in complicated background based on wavelet transforming
  • Vehicle registration extract method in complicated background based on wavelet transforming

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Embodiment Construction

[0082] Adopt the method of the present invention, at first at the entrance of expressway, toll booth and other any suitable positions adopt the original image of photographing device to automatically take pictures of vehicle; Processed in software written in Matlab language; finally a license plate image containing identifiable numbers is obtained. In the experiment, a total of 353 color vehicle images taken on the spot were used as the original data. 348 images were roughly located, with a positioning accuracy rate of 98.58%, and 346 images were precisely located, with a positioning accuracy rate of 98.02%. The license plate image only takes 50ms.

[0083] To sum up, the method of the present invention can quickly and accurately locate the license plate image containing the recognizable number from the provided original vehicle image.

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Abstract

This invention provides one car pad extraction method based on wavelet exchange complex background, which comprises the following steps: adopting rough positioning an accurate positioning; the fine positioning adopts wavelet to extract pad area high frequency information for brightness and color regression process to get one integral background and number color composed of identification number pad.

Description

technical field [0001] The invention belongs to the technical field of electronic information processing, in particular to a license plate extraction method in a complex background in the license plate recognition technology. Background technique [0002] Intelligent transportation system is currently a frontier research topic in the field of transportation in the world. Developed countries have proposed and implemented a series of research plans, the core of which is to use information technology, communication technology, computer technology, control In-depth transformation of traditional transportation systems, such as technology, to improve the efficiency of system resource use, system security, reduce resource consumption and environmental pollution, and my country is no exception in this regard. The license plate recognition technology in the intelligent transportation system mainly realizes automatic recognition of driving vehicle license plates, thereby completing fun...

Claims

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Application Information

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IPC IPC(8): G06K9/60G06T7/00G06K9/00G06K9/46G06T7/11G06T7/194
Inventor 解梅刘大良
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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