Hybrid Watermarking Framework Using Discrete Wavelet Transform and Visual Cryptographic Scheme| Chapter 5 | Current Concepts in Engineering Research and Technology Vol. 1

 

The rapid growth of the internet and easy access to multimedia data have increased concerns about unauthorised use and redistribution of digital content. Digital watermarking is a widely used technique for copyright protection and authentication of digital multimedia. Several watermarking techniques have been proposed in the literature, limited research has been conducted on the effective integration of multi-level DWT with visual hiding schemes to achieve both high robustness and perceptual quality simultaneously. This chapter presents a robust copyright protection scheme based on the discrete wavelet transform (DWT) and visual hiding scheme (VHS). Unlike the traditional schemes, in this proposed scheme, the original image was modified by embedding the watermark into the original image. The visual hidden scheme was used to construct a watermarked image. In embedding, 3 level DWT was applied on the cover image and then the embedding of the watermark was performed using the VHS technique after resizing the watermark image. In order to express the robustness and perceptibility of the presented watermark scheme, experimental results show the performance of the proposed scheme based on parameters, peak signal-to-noise ratio and resistance against various signal processing operations and attacks. The proposed scheme shows higher perceptible performance of the watermarked image without an attack environment produces 51.8 dB PSNR and a minimum of 47.7dB for test images. Under an attack environment, the performance degrade not significantly but in under tolerable range of 30 dB to       42 dB. In future work, the fractional transforms can be more suitably used to increase system robustness in the same direction.

 

 

Author(s) Details

Deepak Sharma
Department of Electronics and Communication Engineering, Jaypee University of Engineering and Technology, Guna, (M.P.), India.

 

Bali Ram Gupta
Department of Mathematics, Jaypee University of Engineering and Technology, Guna, (M.P.), India.

 

Shefali Sharma
Department of Electronics and Communication Engineering, Jaypee University of Engineering and Technology, Guna, (M.P.), India.

 

Please see the book here :- https://doi.org/10.9734/bpi/ccert/v1/6977