Gurwinder Singh

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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(More)
The aim of this paper is to examine a set of wavelet functions (wavelets) used in image watermarking system. Several wavelet functions are used to transform the component detail of the image in frequency domain. Discrete wavelet transform (DWT), discrete Fourier transform (DFT) and discrete cosine transform (DCT) are some commonly used transform domain(More)
A simple and efficient way to synthesize activated mesoporous biocarbons (AMBs) with extremely high BET surface area and large pore volume has been achieved for the first time through a simple solid state activation of freely available biomass, Arundo donax, with zinc chloride. The textural parameters of the AMB can easily be controlled by varying the(More)
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