Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (2): 126-131.doi: 10.3969/j.issn.1000-565X.2010.02.024

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Feature Extraction Algorithm of Block Edge Pattern Based on H. 264 I-Frame Coding

Feng Jie   Chen Yao-wu   

  1.  Institute of Advanced Digital Technology and Instrumentation, Zhejiang University, Hangzhou 310024, Zhejiang, China
  • Received:2009-03-19 Revised:2009-05-04 Online:2010-02-25 Published:2010-02-25
  • Contact: 冯杰（1980-），男，博士生，主要从事压缩域图像与视频检索研究． E-mail:fengjie_zju@yahoo．cn
  • About author:冯杰（1980-），男，博士生，主要从事压缩域图像与视频检索研究．
  • Supported by:

    浙江省科技计划重大科技攻关项目（2006C11200）

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Abstract:

This paper proposes a feature extraction algorithm for the block edge pattern from H. 264 I-frame bit streams and verifies the extracted features by image retrieval applications. In the proposed algorithm, five block edge patterns are extracted based on the intra prediction mode and the prediction coefficients from H. 264 bit streams, which accord with the edge descriptor in MPEG-7 and are suitable for content-based image retrieval algorithms. Experimental results show that the image retrieval based on the extracted features is relatively precise, and the average precision is 5.07% higher than that of the retrieval based only on the texture descriptor of intra prediction mode.

Key words: block edge pattern, image retrieval, MPEG-7, H. 264-frame coding