应用科学学报 ›› 2016, Vol. 34 ›› Issue (6): 691-701.doi: 10.3969/j.issn.0255-8297.2016.06.005

• 信号与信息处理 • 上一篇    下一篇

基于内容结构图的鲁棒图像哈希

李新伟1,2, 夏秀珍1   

  1. 1. 河南理工大学电气工程与自动化学院, 河南 焦作 454000;
    2. 河南省高等学校控制工程重点学科开放实验室, 河南 焦作 454000
  • 收稿日期:2016-04-26 修回日期:2016-07-07 出版日期:2016-11-30 发布日期:2016-11-30
  • 作者简介:李新伟,博士,研究方向:图像哈希、视频指纹、多媒体信息等,E-mail:lixinwei@hpu.edu.cn
  • 基金资助:

    国家自然科学基金(No.61402152);河南省高等学校控制工程重点学科开放实验室课题基金(No.KG2014-06);河南理工大学博士基金(No.B2013-022)资助

Robust Image Hashing Based on Content Structure Diagram

LI Xin-wei1,2, XIA Xiu-zhen1   

  1. 1. School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, Henan Province, China;
    2. Key Laboratory of Control Engineering of Henan Province, Jiaozuo 454000, Henan Province, China
  • Received:2016-04-26 Revised:2016-07-07 Online:2016-11-30 Published:2016-11-30

摘要:

为提高拷贝检测系统的鲁棒性和效率,提出一种鲁棒图像哈希算法. 用Gabor变换系数构建图像内容结构图,将它从笛卡尔坐标系变换到极坐标系进行归一化. 将归一化的结构子图加权,求得特征向量,最后通过量化得到二值哈希码. 基于Gabor系数的内容结构图有很强的鲁棒性和独特性,量化中采用的失真哈希码融合和双密钥进一步提升了算法的鲁棒性、独特性、紧凑性. 利用公开数据库分别对所提出的算法和多种代表性算法进行对比实验,比较对象包括非负矩阵分解哈希、形状上下文哈希、圆环分割与不变向量距离哈希. 实验表明,该算法在查准率和查全率方面均表现突出,匹配效率也有大幅提升,整体性能优于对比算法.

关键词: 鲁棒, 哈希码融合, 图像哈希, 内容结构图, Gabor变换

Abstract:

Robust image hashing is proposed for improving robustness and matching efficiency of copy detection system. Gabor transform coefficients of the image are used to construct structure diagrams. They are transformed from the Cartesian coordinates to polar coordinates, and normalized to obtain new diagrams. The weighted sum of their subblock pixels are calculated to obtain feature vectors, which are then quantized to produce the final binary hash codes. The structure diagrams based on Gabor coefficients proposed in this work are robust and distinctive. The distorted hash code fusion and double keys used in quantization further improve robustness, distinctiveness and compactness of the algorithm. The proposed method is compared with several representative image hashing approaches such as the non-negative matrix factorization hashing, radial and angular shape context hashing, ring partition and invariant vector distance hashing using a large image database. The results show that the overall performance of the proposed algorithm is significantly better than the other methods in terms of precision and recall rates, as well as matching efficiency.

Key words: robustness, hash code fusion, image hashing, content structure diagram, Gabor transform

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