Hybrid Watermarking Technique using DWT Subband Structure and Spatial Edge Information 


Vol. 29,  No. 5, pp. 706-714, May  2004


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  Abstract

In this paper, to decide the watermark embedding positions and embed the watermark, we use the subband tree structure which is presented in the wavelet domain and the edge information in the spatial domain. The significant frequency rcgion is estimated by the subband scarching from thc higher frequency subband to the lower frequency subband. LHI subband which has the higher frequency in tree structure of the wavelet domain is divided into 4x4 submatrices, and the threshold which is used in the watermark embedding is obtained by the blockmatrix which is consists by the average of 4x4 submatrices. Also the watermark embedding position, Keymap is generated by the blockmatrix for the energy distribution in the frequency domain and the edge information in the spatial domain. The watermark is embedded into the wavelet coefficients using the Keymap and the random sequence generated by LFSR(Linear feedback shift register). Finally after the inverse wavelet transform the watermark embedded image is obtained. the proposed watermarking algorithm showed PSNR over 2dB and had the higher results from 2% to 8% in the comparison with the previous research for the attack such as the JPEG compression and the general image processing just like blurring, sharpening and gaussian noise.

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  Cite this article

[IEEE Style]

Y. Seo and D. Kim, "Hybrid Watermarking Technique using DWT Subband Structure and Spatial Edge Information," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 5, pp. 706-714, 2004. DOI: .

[ACM Style]

Young-Ho Seo and Dong-Wook Kim. 2004. Hybrid Watermarking Technique using DWT Subband Structure and Spatial Edge Information. The Journal of Korean Institute of Communications and Information Sciences, 29, 5, (2004), 706-714. DOI: .

[KICS Style]

Young-Ho Seo and Dong-Wook Kim, "Hybrid Watermarking Technique using DWT Subband Structure and Spatial Edge Information," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 5, pp. 706-714, 5. 2004.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880