Image watermarking using IWT-SVD and its comparative analysis with DWT-SVD

Abstract

In this era of internet, protection of digital images has become an important concern. Digital image watermarking is a scheme that has been developed to protect confidential digital images from illegal copy and manipulations. There are various methods of watermarking but to achieve good imperceptibility and robustness, a combined image watermarking algorithm based on Integer Wavelet Transform (IWT) and Singular Value Decomposition (SVD) has been developed here. Another aim of this paper is to compare the performance of IWT-SVD algorithm at different scaling factors with DWT-SVD technique. The experimental results have been shared for both the techniques and different evaluation parameters such as; Peak Signal to Noise Ratio (PSNR) and Normalized Cross Correlation (NCC) have been calculated & compared in tabular forms.