K. Rajarajeswari

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A novel oblivious and robust image watermarking scheme using Multiple Descriptions Coding (MDC) and Quantization Index Modulation (QIM) is presented in this work. In the proposed scheme, watermark is embedded in two stages to increase the robustness of the watermark against many of the image processing attacks. First stage embedding is based on MDC. Using(More)
The task of radar pulse compression is formulated as a multi-objective optimization problem and has been effectively solved using radial basis function (RBF) network and multi-objective genetic algorithm (NSGA-II). The pulse compression performance of three different codes in terms of signal to peak side-lobe ratio (SSR) under noisy environment, range(More)
In this work, a robust and oblivious image watermarking scheme based on Discrete Wavelet Transform (DWT) for copyright protection is presented. The original unmarked image is not required for watermark extraction. Second level DWT is applied to the original cover image and horizontal detail sub band (LH 2) is selected for embedding a binary watermark.(More)
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