Journal of Applied Sciences ›› 2019, Vol. 37 ›› Issue (5): 704-710.doi: 10.3969/j.issn.0255-8297.2019.05.011

• Special Issue: Information Security of Multimedia • Previous Articles     Next Articles

PRNU Extraction Algorithm Based on Trilateral Weighted Sparse Coding Model

ZHANG Yongsheng1,2, TIAN Huawei1,2, XIAO Yanhui1,2, HAO Xinze1,2, ZHANG Mingwang3   

  1. 1. School of National Security and Counter Terrorism, People's Public Security University of China, Beijing 100038, China;
    2. Research Center for Public Security Information, People's Public Security University of China, Beijing 100038, China;
    3. Institute of Research, Sichuan Police College, Luzhou 646000, Sichuan Province, China
  • Received:2019-07-27 Revised:2019-08-01 Online:2019-09-30 Published:2019-10-18

Abstract: Estimating the real noise of real-world image is the most important issue of image source forensics based on photo-response non-uniformity (PRNU). Compared with the estimation of additive white Gaussian noise (AWGN), most exsiting noise estimation algorithms used in PRNU extraction behave with poor satisfaction in estimating real noise. In this paper, we propose a PRNU extraction algorithm based on trilateral weighted sparse coding model (TWSCM). TWSCM has advantage in estimating the real noise of real-world image, because it can keep more PRNU noise in the estimation results. Having been tested on the largest image source forensics database, the proposed TWSCM-based PRNU extraction algorithm outperforms the existing algorithm of source forensic.

Key words: image source forensic, photo-response non-uniformity (PRNU), real-word image denoising

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