An Efficient Passive Authentication Scheme for Copy-Move Forgery Based on DCT

Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10040)

Abstract

Digital images can be easily manipulated due to availability of powerful image processing software. Passive authentication as a common challenge method of digital image authentication is extensively used to detect the copy-move forgery images. In this paper, a passive authentication scheme is proposed to authenticate copy-move forgery based on discrete cosine transform (DCT). At the feature extraction step, DCT is applied to image blocks and makes use of the means of DCT coefficients to represent image blocks. The size of feature vectors are optimized. At the matching step, a set number of packages is used to store the feature vectors. The similar blocks can be found by comparing the feature vectors that are contained in adjacent packages. The experimental results demonstrate that the proposed scheme can locate irregular and meaningful tampered regions and multiply duplicated regions. In addition, it can also locate the duplicated regions in digital images that are distorted by adding white Gaussian noise, Gaussian blurring and their mixed operations.

Keywords

Passive authentication Copy-move forgery Feature extraction Packages 

Notes

Acknowledgments

This research is supported by the National Natural Science Foundation of China (NSFC) under the grant No. U1536110.

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Copyright information

© Springer International Publishing AG 2016

Authors and Affiliations

  1. 1.School of Information Science and TechnologySouthwest Jiaotong UniversityChengduChina

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