Wireless Communication Security

3Enhanced Image Security Through Hybrid Approach: Protect Your Copyright Over Digital Images

Shaifali M. Arora and Poonam Kadian*

Maharaja Surajmal Instutute of Technology C-4, Janakpuri, New Delhi, India

Abstract

The security of the watermark against unauthorized detection is a major point of concern. If some illicit user can detect the watermark from the watermarked image then he can very easily remove that watermark by making the image copyright-free or he may also remove the originally embedded watermark and insert his watermark. In both ways, the illicit user can diminish the original owner’s copyright over the image. This leads to the requirement of methods that can provide security against the unauthorized detection of the watermark. To find the solution to this problem, a greatly secure grayscale image watermarking algorithm that uses DWT-SVD approach has been proposed. In this work, a balance between robustness and imperceptibility has also been retained. It is apparent that the proposed algorithm provides improvised robustness and imperceptibility and the method is providing security to the watermark as well.

Keywords: Watermarking, discrete wavelet transform, SVD, imperceptibility, robustness

3.1 Introduction

In the past few decades, the popularity of internet technology has increased enormously. It has led to easiness in communication and dissemination of digital documents such as image, video, text, and audio. However, the very conveniently available image processing ...