License Plate Recognition Based on Fractal and Hidden Markov Feature

GENG Qing-tian1; 2; ZHAO Hong-wei1

doi:10.3788/OPE.20132112.3198

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License Plate Recognition Based on Fractal and Hidden Markov Feature

更新时间：2020-08-12

- License Plate Recognition Based on Fractal and Hidden Markov Feature
- Optics and Precision Engineering Vol. 21, Issue 12, Pages: 3198-3204(2013)
- 作者机构：
  
  长春师范大学计算机科学与技术学院2. 吉林大学计算机科学与技术学院
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20132112.3198
  CLC： TP391.4
- Received：09 July 2013，
  
  Revised：23 August 2013，
  
  Published Online：25 December 2013，
  
  Published：25 December 2013
- 稿件说明：
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耿庆田赵宏伟. 基于分形维数和隐马尔科夫特征的车牌识别[J]. 光学精密工程, 2013,21(12): 3198-3204

GENG Qing-Tian ZHAO Hong-wei. License Plate Recognition Based on Fractal and Hidden Markov Feature[J]. Editorial Office of Optics and Precision Engineering, 2013,21(12): 3198-3204
耿庆田赵宏伟. 基于分形维数和隐马尔科夫特征的车牌识别[J]. 光学精密工程, 2013,21(12): 3198-3204 DOI： 10.3788/OPE.20132112.3198.

GENG Qing-Tian ZHAO Hong-wei. License Plate Recognition Based on Fractal and Hidden Markov Feature[J]. Editorial Office of Optics and Precision Engineering, 2013,21(12): 3198-3204 DOI： 10.3788/OPE.20132112.3198.

摘要

针对现有车牌识别方法中车牌二值化和车牌字符识别效率不高的问题，提出一种基于分形维数和隐马尔科夫特征的车牌识别算法。该方法基于分形维数和隐马尔科夫特征并利用联合OC_SVM和MC_SVM的方法进行车牌识别。实验中，基于分形维数进行车牌的二值化处理；利用隐马尔科夫特征办法进行字符特征提取，然后利用多重分类器进行字符识别。对字符、英文字母和阿拉伯数字分别进行了800幅、800幅和1600幅图像的识别，得到的结果显示该算法对字符、英文字母和阿拉伯数字的识别率分别为98%、98.5%和98.9%

对各种不同的车牌整体识别的平均识别率高于90.60%。该方法识别效率高、鲁棒性强，为车牌识别的准确性提供了保证。

Abstract

Because existing license plate recognition algorithm has lower efficiency in the binarization and character recognition

a license plate recognition algorithm based on fractal dimension and hidden Markov features was proposed. The algorithm is based on fractal dimension and hidden Markov features

and uses the joint classification of OC_SVM and MC_SVM to recognize license plates. In experiments

the fractal dimension was used complement the binarization of the license plate

the hidden Markov features were taken to extract character features and a multi-classifier was utilized to recognize the character. 800 Chinese character images

800 English letter images and 1600 Arabic numeral images were recognized

obtained results show that the recognition rates of Chinese characters

English letters and Arabic numerals are 98%

98.5% and 98.9%

respectively

the average recognition rate of license plates is more than 90.60%.It concludes that the method has higher efficiency

better accuracy and stronger robustness

and it can provide a guarantee for license plate recognition.

关键词

Keywords

references

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