Blind self-authentication of images for robust watermarking using integer wavelet transform |
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Authors: | Amit Bohra Omar Farooq |
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Affiliation: | 1. Department of Electronics Engineering, ZH College of Engineering and Technology, AMU Aligarh 202 002, India;2. Department of Electronic and Electrical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK;3. Department of Computer Engineering, ZH College of Engineering and Technology, AMU Aligarh 202 002, India |
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Abstract: | In this letter a new technique for robust watermarking of images is proposed based on second-generation wavelets (lifting-based integer wavelet transform). The scheme along with its robustness has got the capability of blind self-authentication of the watermarked images. The watermarked images show no perpetual degrading and gives peak signal to noise ratio (PSNR) in excess of 40 dB due to the use of integer-to-integer transform. Simulation results show the superior performance of the proposed technique as compared to a similar existing scheme under different attacks such as filtering, compression and rotation. Further, due to two independent process of watermark sequence extraction proposed in this letter, any alteration in the image results into dissimilar sequences, thereby detecting tampering in the image. |
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