电子学报 ›› 2016, Vol. 44 ›› Issue (11): 2592-2599.DOI: 10.3969/j.issn.0372-2112.2016.11.005

• 学术论文 • 上一篇    下一篇

具有几何不变性的图像复制-粘贴盲鉴别算法

吕颖达1,2,3, 申铉京1,2, 陈海鹏1,2   

  1. 1. 吉林大学计算机科学与技术学院, 吉林长春 130012;
    2. 吉林大学符号计算与知识工程教育部重点实验室, 吉林长春 130012;
    3. 吉林大学公共计算机教学与研究中心, 吉林长春 130012
  • 收稿日期:2015-04-23 修回日期:2015-07-03 出版日期:2016-11-25
    • 通讯作者:
    • 陈海鹏
    • 作者简介:
    • 吕颖达,女,1983年生于河北文安.吉林大学计算机科学与技术学院博士.研究方向为图像处理、数字图像取证及模式识别;申铉京,男,1958年生于吉林和龙.吉林大学计算机科学与技术学院教授、博士生导师.研究方向为多媒体技术、图像处理和智能检测系统.
    • 基金资助:
    • 国家自然科学基金 (No.61305046); 吉林省自然科学基金 (No.20140101193JC,No.20130522117JH,No.20150101055JC)

Blind Forensic for Image Copy-Paste Tampering with Geometric Invariance

LÜ Ying-da1,2,3, SHEN Xuan-jing1,2, CHEN Hai-peng1,2   

  1. 1. College of Computer Science and Technology, Jilin University, Changchun, Jilin 130012, China;
    2. Key Laboratory of Symbolic Computation and Knowledg Eengineering of Ministry of Education, Jilin University, Changchun, Jilin 130012, China;
    3. Center for Computer Fundamental Education, Jilin University, Changchun, Jilin 130012, China
  • Received:2015-04-23 Revised:2015-07-03 Online:2016-11-25 Published:2016-11-25

摘要:

提出一种具有几何不变性的复制-粘贴盲鉴别算法.该算法首先定义灰度级别和灰度结构,根据像素的灰度级别划分图像块,再结合其灰度结构定位可疑块对;然后对每一组可疑块对进行基于对数极坐标变换的相位相关,并粗略定位篡改区域;最后,精确计算篡改区域之间的旋转角度、缩放尺度及平移量,从而定位复制-粘贴区域.实验结果表明,该算法不但具有旋转、缩放等几何不变性,而且具有较高检测效率及较强的鲁棒性.

关键词: 盲鉴别, 复制-粘贴篡改, 对数极坐标变换, 相位相关

Abstract:

A blind identification algorithm for image copy-paste tampering with geometric invariance was proposed in this study.Firstly,gray level and gray structure are defined,the image is divided into blocks according to the gray levels of pixels,and the suspicious blocks in the image is positioned through the gray structure;Secondly,phase correlation is made for each group of suspicious block based on logarithm polar coordinate transformation,and the tampering regions are located preliminarily;Finally,the rotation angle,scale and translation measurements are calculated precisely,and the tampering regions are positioned.The experimental results show that our algorithm performs well against copy-rotate/scale-paste tampering,and its detection efficiency and robustness are better than the existing algorithms.

Key words: blind forensic, copy-paste tampering, logarithm polar coordinate transformation, phase correlation

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