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An Improved DCT-based Image Watermarking Scheme
Ziqiang Cheng(청즈치앙),Dae-Soo Kim(김대수),Kee-Young Yoo(유기영) 대한전자공학회 2010 대한전자공학회 학술대회 Vol.2010 No.6
Many DCT-based watermarking schemes have been proposed in the past few years. In 2009, Lin et al proposed a scheme that focused on resisting JPEG compression attack. However, it fails to verify ownership when cropping reconstruction attack is applied, and the watermarked image degrades quite significantly after embedding watermark bits. In order to solve these problems of Lin et al’s scheme, an improved scheme was proposed in this paper. The experimental results show that the proposed scheme resist on cropping reconstruction attack, and also achieve better invisibility than Lin et al’s scheme.