DWT-SVD Based Robust Digital Image Watermarking using Adaptive Median Filter

1 M.Tech, Centre for Computer Science and Technology, Central University of Punjab, Bathinda Punjab (India), Pin no.151001 [email protected] 2 Assistant Professor, Centre for Computer Science and Technology, Central University of Punjab, Bathinda Punjab (India), Pin no.151001 [email protected] Abstract: In the recent times to protect the copyright in digital images, the digital watermarking has emerged. Various techniques of watermarking have evolved, each having different advantages under different scenarios. Primarily the watermark can either be inserted in spatial domain or transform domain. The transform domain based watermarking techniques are more robust than spatial domain techniques. This paper presents, a new robust digital image watermarking technique, based on Discrete Wavelet Transform and Singular Value Decomposition (i.e. DWT-SVD) using Adaptive median filter. The embedding of watermark is done in the high frequency band (HL) by modifying the SVD values. The proposed scheme has been tested in MATLAB environment against various attacks. Simulation results show that the proposed technique can survive a variety of attacks (including JPEG compression attacks).