Detection of image region-duplication with rotation and scaling tolerance

Authors:
Qiumin Wu;Shuozhong Wang;Xinpeng Zhang
Affiliations:
School of Communication and Information Engineering, Shanghai University, Shanghai, China;School of Communication and Information Engineering, Shanghai University, Shanghai, China;School of Communication and Information Engineering, Shanghai University, Shanghai, China
Venue:
ICCCI'10 Proceedings of the Second international conference on Computational collective intelligence: technologies and applications - Volume PartI
Year:
2010

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Abstract

Copy-move forgery, or region-duplication, is a common type of digital image tampering. This paper presents a novel approach to detect copy-move forgery even if rotation and/or scaling took place before copying. The image under test is divided into fixed-size blocks, and log-polar Fourier transform (LPFT) is performed on the inscribed circles of these blocks. Similarity in the LPFT between different patches provides an indication of the copy-move operation. Experimental results show efficacy of the proposed method.