A copyright protection scheme for digital images based on shuffled singular value decomposition and visual cryptography.

B Pushpa Devi,Kh Manglem Singh,Sudipta Roy

doi:10.1186/s40064-016-2733-0

B Pushpa Devi, Kh Manglem Singh + Show 1 more

Open Access

https://doi.org/10.1186/s40064-016-2733-0

Copy DOI

Abstract

This paper proposes a new watermarking algorithm based on the shuffled singular value decomposition and the visual cryptography for copyright protection of digital images. It generates the ownership and identification shares of the image based on visual cryptography. It decomposes the image into low and high frequency sub-bands. The low frequency sub-band is further divided into blocks of same size after shuffling it and then the singular value decomposition is applied to each randomly selected block. Shares are generated by comparing one of the elements in the first column of the left orthogonal matrix with its corresponding element in the right orthogonal matrix of the singular value decomposition of the block of the low frequency sub-band. The experimental results show that the proposed scheme clearly verifies the copyright of the digital images, and is robust to withstand several image processing attacks. Comparison with the other related visual cryptography-based algorithms reveals that the proposed method gives better performance. The proposed method is especially resilient against the rotation attack.

Highlights

Copyright ownership of multimedia data is vulnerable to the image processing attacks as it can be copied without loss of quality with no limitation on the number of copies, tempered and redistributed illegally without authorization due to the growth of the digital multimedia technology tools and omnipresent of the Internet
Some researchers have proposed detection based on the visual cryptography (VC) that does not alter the original image in order to preserve the visual quality of the image, but generates two shares known as the ownership share and the identification share
A robust and blind watermarking scheme for copyright protection based on the visual cryptography and the singular values of singular value decomposition (SVD) of the image is proposed that generates shares comparing the mean of the largest singular values from each block in the image with the largest singular value of the selected block (Wang and Chen 2007)

Summary

Introduction

Copyright ownership of multimedia data is vulnerable to the image processing attacks as it can be copied without loss of quality with no limitation on the number of copies, tempered and redistributed illegally without authorization due to the growth of the digital multimedia technology tools and omnipresent of the Internet. Hwang proposed a robust and blind copyright protection scheme based on the visual cryptography that generates shares comparing the most significant bits (MSB) of the pixels in the image with the global mean intensity of the image (Hwang 2000).

Results

Conclusion