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A New JPEG Image Watermarking Method Exploiting Spatial JND Model

  • Liwen Qin
  • Xiaolong Li
  • Yao ZhaoEmail author
Conference paper
  • 70 Downloads
Part of the Lecture Notes in Computer Science book series (LNCS, volume 12022)

Abstract

For JPEG images, the current digital watermarking methods mainly embed the watermark by modifying the DCT coefficients, in which the spatial visual performance isn’t well taken into account. As a result, significant visual distortion can be observed in smooth and boundary regions of the marked image. Then, to improve the visual quality of the marked image, a new JPEG image watermarking method exploiting the spatial just-noticeable-difference (JND) model is proposed in this paper. In the proposed method, the watermark is embedded into the DCT domain, but the embedding strength is directly determined by a spatial JND model. Moreover, for each DCT block, the variances calculated from the difference blocks along four different directions are controlled to further enhance the imperceptibility. Finally, an optimization problem is summarized and developed to obtain the optimal embedding strength that meets the above requirements. Experimental results show that, with the same PSNR and robustness, the proposed method has better imperceptibility than the prior art.

Keywords

DCT domain digital watermarking Spatial JND model Optimization problem 

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Institute of Information ScienceBeijing Jiaotong UniversityBeijingChina
  2. 2.Beijing Key Laboratory of Advanced Information Science and Network TechnologyBeijingChina

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