Optimised robust watermarking technique using CKGSA in DCT-SVD domain

Digital watermarking embeds a watermark to minimise the problem of illegal copying and disseminating multimedia contents. However, the existing techniques do not maintain the imperceptibility and robustness simultaneously. To achieve the same, this study proposes an optimised robust watermarking technique using chaotic kbest gravitational search algorithm. The chaotic kbest gravitational search algorithm is used to obtain the optimal values of embedding factors. The efficacy of the proposed technique has been experimented on a standard images and compared with the six recent state-of-the-art techniques in terms of imperceptibility and robustness. The experimental results validate that the proposed technique outperforms the other considered techniques.