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Entropy based image watermarking using discrete wavelet transform and singular value decomposition

Improving the imperceptibility and robustness of the watermarked image is the key objective or requirement of an image watermarking technique. To achieve this objective, entropy based image watermarking technique is proposed in this paper. In this proposed approach, the watermark image is embedded into selected blocks of cover image rather than in the full image. These blocks are selected on the basis of entropy content. Peak signal-to-noise ratio (PSNR) is calculated to measure the imperceptibility of the proposed scheme. Moreover, the simulation results also depict that the proposed entropy based approach is capable of withstanding a wide range of image processing or signal processing attacks.