DWT-SVD Combination Method for Copyrights Protection

Eko Hari Rachmawanto,Rizky Putra Pradana,Christy Atika Sari

doi:10.15294/sji.v7i1.21050

Abstract

Many irresponsible people who download other people's artwork then modify and redistribute the work of someone without permission by not including the owner's name. Based on that problem an attempt was made to provide an invisible watermark so as not to be easy to do the watermark removal process on the artwork, using a 2-level DWT and SVD combination method that can embed watermarks invisibly and increase watermarking resistance to the image from various image manipulation processes such as noise, JPEG compression, and so on. From combination method of DWT-SVD got the highest PSNR value with watermark image size 32x32 and 64x64 which is 59.2656 dB and 54.7414 dB, respectively.

Highlights

The development of technology, especially in the field of the internet, is increasing rapidly [1] [2], facilitate some people in accessing something practically on the internet [3]
The easier accessing internet, many irresponsible people who download the artwork of others modify [4], and redistribute the work without permission and does not include the owner's name that caused the loss to the owner in case of misuse of the dissemination done illegally [5]
The visible watermark [6] is good to know directly who the owner of the artworks but in that way, it will degrade the quality of work because it will be covered by the watermark and make irresponsible people to remove the watermark in various ways, whereas if watermarking is done invisibly [4] the work will not be covered and confuse irresponsible people who want to remove the watermark from the artwork

Summary

INTRODUCTION

The development of technology, especially in the field of the internet, is increasing rapidly [1] [2], facilitate some people in accessing something practically on the internet [3]. The easier accessing internet, many irresponsible people who download the artwork of others modify [4], and redistribute the work without permission and does not include the owner's name that caused the loss to the owner in case of misuse of the dissemination done illegally [5]. According to [7], embedding the invisible watermark can be grouped into 2 ways, which are the spatial domain and the transform domain. The spatial domain can embed the watermark directly into the host image pixel and can be implemented and quickly, while in the transform domain, the hots image is converted to the frequency form before embedding watermark [8]. The domain transform method, robust against various kinds of image manipulation processes such as compression process [2], in this paper use domain transform method. After method has been applied, it has been tested with various attacks such as salt and pepper, Gaussian filter and JPEG compression and analyzed using PSNR (Peak to Signal Noise Ratio) calculation to measure imperceptibility value and NC calculation (Normal Correlation) to measure robustness value [9]

METHODS

Watermarking Evaluation

AND DISCUSSION

CONCLUSION