Composition of Non Blind Multiplicative Watermarking using Translational Attack with 2D-DWT

Electronics & Communication Engineering

Digital Watermarking is nowadays one of the most developing area for ownership concern of digital images “ Attack Analysis of Non Blind Discrete Wavelet Transformation Based Watermark Embedding and Extraction Algorithm” is one of the digital watermarking algorithm developed for embedding and extraction of watermark, by improving Sreenevisan Algorithm, in which Gaussian random number is utilized as a watermark but in ASG algorithm image is taken as watermark and host image decomposed in frequency transform domain by utilizing the two dimensional discrete wavelet transformation upto one level and then digital watermark as image is embedded in all sub-bands of decomposed image utilizing additive embedding technique. For checking the robustness of the ASG watermarking algorithm tested by attacking watermarked image with Geometric Attack i.e. Translational and Rotational attack and Gaussian noise attack using Matlab. ASG watermarking algorithm withstands all attacks and can be said as robust for all tested attack. But Naveen Kedia algorithm image is taken as watermark and host image decomposed in frequency transform domain by utilizing the two dimensional discrete wavelet transformation up to one level and then digital watermark as image is embedded in all sub-bands of decomposed image utilizing Multiplicative embedding technique. We tried to improve the robustness of ASG algorithm by using Naveen Kedia multiplicative embedding technologies in which decomposing the image upto one level using DWT with db1(Daubachies 1) wavelet transform, then digital watermark as image is embedded in all sub-bands of decomposed image utilizing multiplicative embedding technique. For checking the robustness of the Naveen Kedia watermarking algorithm tested by attacking watermarked image with Geometric Attack i.e Translation attack using Matlab. Then tested watermarking attacks using Naveen Kedia multiplicative algorithms comparing the results with the ASG watermarking attacks.

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