Tampered Region Localization of Digital Color Images Based on JPEG Compression Noise

  • Wei Wang
  • Jing Dong
  • Tieniu Tan
Conference paper

DOI: 10.1007/978-3-642-18405-5_10

Part of the Lecture Notes in Computer Science book series (LNCS, volume 6526)
Cite this paper as:
Wang W., Dong J., Tan T. (2011) Tampered Region Localization of Digital Color Images Based on JPEG Compression Noise. In: Kim HJ., Shi Y.Q., Barni M. (eds) Digital Watermarking. IWDW 2010. Lecture Notes in Computer Science, vol 6526. Springer, Berlin, Heidelberg

Abstract

With the availability of various digital image edit tools, seeing is no longer believing. In this paper, we focus on tampered region localization for image forensics. We propose an algorithm which can locate tampered region(s) in a lossless compressed tampered image when its unchanged region is output of JPEG decompressor. We find the tampered region and the unchanged region have different responses for JPEG compression. The tampered region has stronger high frequency quantization noise than the unchanged region. We employ PCA to separate different spatial frequencies quantization noises, i.e. low, medium and high frequency quantization noise, and extract high frequency quantization noise for tampered region localization. Post-processing is involved to get final localization result. The experimental results prove the effectiveness of our proposed method.

Keywords

Image forensics Tampered region localization JPEG compression noise PCA 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Wei Wang
    • 1
  • Jing Dong
    • 1
  • Tieniu Tan
    • 1
  1. 1.National Laboratory of Pattern RecognitionInstitute of Automation, Chinese Academy of SciencesBeijingP.R. China

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