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Robust Image Watermarking Scheme Based on Wavelet Technique
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International Journal of Computer Science and Security (IJCSS)
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Volume:  5    Issue:  4
Pages:  NULL
Publication Date:   September / October 2011
ISSN (Online): 1985-1553
394 - 404
Published Date   
CSC Journals, Kuala Lumpur, Malaysia
Keywords   Abstract   References   Cited by   Related Articles   Collaborative Colleague
KEYWORDS:   Multi-bands Wavelet, Semi Blind Watermark Detection, Robustness 
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In this paper, an image watermarking scheme based on multi bands wavelet transformation method is proposed. At first, the proposed scheme is tested on the spatial domain (for both a non and semi blind techniques) in order to compare its results with a frequency domain. In the frequency domain, an adaptive scheme is designed and implemented based on the bands selection criteria to embed the watermark. These criteria depend on the number of wavelet passes. In this work three methods are developed to embed the watermark (one band (LL|HH|HL|LH), two bands (LL&HH | LL&HL | LL&LH | HL&LH | HL&HH | LH&HH) and three bands (LL&HL&LH | LL&HH&HL | LL&HH&LH | LH&HH&HL) selection. The analysis results indicate that the performance of the proposed watermarking scheme for the non-blind scheme is much better than semi-blind scheme in terms of similarity of extracted watermark, while the security of semi-blind is relatively high. The results show that in frequency domain when the watermark is added to the two bands (HL and LH) for No. of pass =3 led to good correlation between original and extracted watermark around (similarity = 99%), and leads to reconstructed images of good objective quality (PSNR=24 dB) after JPEG compression attack (QF=25). The disadvantage of the scheme is the involvement of a large number of wavelet bands in the embedding process. 
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Aree Ali Mohammed : Colleagues
Haval Mohammed Sidqi : Colleagues  
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