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计算机工程 ›› 2013, Vol. 39 ›› Issue (1): 195-199. doi: 10.3969/j.issn.1000-3428.2013.01.042

• 人工智能及识别技术 • 上一篇    下一篇

基于改进Chamfer匹配的台标识别

胡星火,姚剑敏,林志贤,郭太良   

  1. (福州大学物理与信息工程学院,福州 350002)
  • 收稿日期:2011-10-14 修回日期:2011-12-22 出版日期:2013-01-15 发布日期:2013-01-13
  • 作者简介:胡星火(1985-),男,硕士研究生,主研方向:图形图像处理;姚剑敏,男,副研究员、博士后;林志贤,副教 授、博士;郭太良,研究员、博士生导师
  • 基金资助:
    国家“863”计划基金资助项目(2008AA03A313);福建省自然科学基金资助项目(2010J01333, 2011J01347);福建省教育厅基金资助项目(JA10033, JA09003)

TV Symbol Recognition Based on Improved Chamfer Matching

HU Xing-huo, YAO Jian-min, LIN Zhi-xian, GUO Tai-liang   

  1. (College of Physics and Information Engineering, Fuzhou University, Fuzhou 350002, China)
  • Received:2011-10-14 Revised:2011-12-22 Online:2013-01-15 Published:2013-01-13

摘要: 已有电视台台标的识别技术多基于视频流处理,实时性较差,且对半透明台标识别效果不佳。为此,提出一种基于改进Chamfer匹配的台标识别方法。利用Canny算子提取台标边缘颜色及梯度方向,采用RANSAC算法对台标边缘进行优化,通过距离变换计算边缘梯度方向的距离图,并基于距离最短准则对其识别。实验结果表明,该方法能实现台标的单帧识别,克服半透明台标的识别难题,平均识别率达97.7%,平均识别时间为801 ms。

关键词: 台标识别, Chamfer匹配, 距离变换, 边缘颜色, 梯度方向

Abstract: The real-time of existing TV symbol recognition method based on streaming video processing is not good, and has a bad result of recognition to semitransparent one. In order to solve this problem, this paper proposes a recognition method of TV symbol based on improved Chamfer matching. It extracts the TV symbol color and edge gradient direction to represent the shape of it by Canny operator, and uses RANSAC algorithm to optimize and fit the edge. It computes the distance image of edge gradient direction by distance transformation, and identification is based on the principle of shortest distance. Experimental results show that the method can realize the recognition of TV symbol in a single frame and overcomes the difficulty of the recognition of semitransparent TV symbol, while its recognition rate is 97.7% and average recognition time is 801 ms.

Key words: TV symbol recognition, Chamfer matching, distance transformation, edge color, gradient direction

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