International Journal of Image, Graphics and Signal Processing (IJIGSP)
IJIGSP Vol. 4, No. 11, 8 Oct. 2012
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A Robust Image Watermarking Scheme Based Multiresolution Analysis
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Author(s)
Index Terms
Wavelet decomposition, Robustness, Digital image Watermarking, Image processing, Peak signal to noise ratio, Multiresolution analysis
Abstract
Digital watermarking has been widely applied to solve copyright protection problems of digital media relating to illegal use of distributions. In digital watermarking, a watermark is embedded into a cover image in such way that the resulting watermarked signal is robust to certain distortion. This paper presents a digital image watermarking based on Discrete Wavelet Transform (DWT). In the proposed method, the watermark as well as the cover image seldom looses the quality in both embedding and extraction process. The embedding process is carried out by tetra-furcating the watermark and embedded into the sub-bands of cover image. Signal to Noise Ratio (SNR) and Peak Signal to Noise Ratio (PSNR) are computed to measure image quality for the DWT transform. We present traces of host and watermarked images. From the traces we observe that, we get good SNR and PSNR with DWT. Experiment evaluation demonstrates that the proposed scheme is able to withstand a variety of attacks. This scheme shows good performance on different types of cover images in terms of imperceptibility and resist to jpeg compression.
Cite This Paper
N. Mohananthini,G. Yamuna,"A Robust Image Watermarking Scheme Based Multiresolution Analysis", IJIGSP, vol.4, no.11, pp.9-15, 2012. DOI: 10.5815/ijigsp.2012.11.02
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