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A Method for Detecting JPEG Anti-forensics

  • Dinesh Bhardwaj
  • Chothmal Kumawat
  • Vinod Pankajakshan
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 841)

Abstract

In this paper, a new approach is proposed for the detection of JPEG anti-forensic operations. It is based on the fact that when a JPEG anti-forensic operation is applied, the values of DCT coefficients are changed. This change decreases, especially in high frequency subbands, if we apply anti-forensic operation again. Hence, we propose to calculate a normalized difference between absolute values of DCT coefficients in 28 high frequency AC-subbands of the test image and its anti-forensically modified version. Based on this normalized feature, it is possible to differentiate between uncompressed and anti-forensically modified images. Experimental results show the effectiveness of the proposed method.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Dinesh Bhardwaj
    • 1
  • Chothmal Kumawat
    • 1
  • Vinod Pankajakshan
    • 1
  1. 1.Department of Electronics and Communication EngineeringIndian Institute of Technology RoorkeeRoorkeeIndia

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