| Paper Details: | Downloads: 812 |
| Serial Number: | P1151345302
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| Title: | Non-Invertible Wavelet Domain Watermarking using Hash Function
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| Authors: | Gangadhar Tiwari, Debashis Nandi , Madhusudhan Mishra
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| Abstract: | This paper proposes a novel watermarking technique by employing Secure Hash Algorithm-2 for generating hash from singular values of high frequency component of wavelet transformed sample image and using it as watermark to protect digital images against invertibility attack. The invertibility attack aims to find a fake watermark and fake original from a watermarked image, to falsely claim the ownership. This scheme performs watermarking and compression simultaneously, by hiding the watermark in wavelet domain and employing arithmetic encoding for compression. Data losses are prevented by performing Histogram modification at both pre and post processing stages. Simulation results indicate that the watermarking scheme is secure against invertibility attack; watermark is recoverable even if the content is altered by geometric attacks, and robust to signal processing distortions. Besides, hiding the watermark in middle bit plane of integer wavelet coefficients and its high frequency sub-bands provides better signal quality while arithmetic encoding results in compressed data. The restored images are distortion free
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| Keywords: | Watermarking, Invertibility Attack, Secure Hash Algorithm-2, Integer Wavelet, Arithmetic Encoding
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| Journal/Conference: | International Journal of Graphics, Vision and Image Processing
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| Volume: | 14
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| Issue: | 1
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| Submission Date: | 11/7/2013 12:00:00 AM
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| Review Date: | 2/1/2014 12:00:00 AM
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| Publishing Date: | 2/4/2014 12:00:00 AM
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| Article Downloads: | 812
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