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Blind DCT-CS Watermarking System Using Subsampling

  • S. M. Renuka DeviEmail author
  • D. Susmitha
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 898)

Abstract

Digital image watermarking is the technology used to protect copyright information of multimedia objects. In this paper, a novel blind image watermarking in transform domain is proposed. The cover image is subsampled into four images, and the correlation between the subimage DCT coefficients is exploited for selecting the embedding locations for watermark. The CS measurements of the watermark are embedded into the selected DCT coefficients of the subsampled image. The watermark is compressively sensed for providing higher embedding capacity than the traditional transform domain watermarking techniques. The outcome of this method is improvement in the security of the system, as the watermark can be recovered only if the receiver has the knowledge of the measurement matrix which serves as a key. Experimental results demonstrate that the extracted watermark and watermarked image is better in terms of PSNR, SSIM, NC, and RMSE under with and without noise attack conditions.

Keywords

Discrete cosine transform Watermarking Compressive sampling Subsampling 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.G. Narayanamma Institute of Technology and Science (for Women)HyderabadIndia

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