Robust Watermarking through Dual Band IWT and Chinese Remainder Theorem

Prajanto Wahyu Adi,Farah Zakiyah Rahmanti,Edy Winarno

doi:10.11591/eei.v7i4.690

Abstract

CRT was a widely used algorithm in the development of watermarking methods. The algorithm produced good image quality but it had low robustness against compression and filtering. This paper proposed a new watermarking scheme through dual band IWT to improve the robustness and preserving the image quality. The high frequency sub band was used to index the embedding location on the low frequency sub band. In robustness test, the CRT method resulted average NC value of 0.7129, 0.4846, and 0.6768 while the proposed method had higher NC value of 0.7902, 0.7473, and 0.8163 in corresponding Gaussian filter, JPEG, and JPEG2000 compression test. Meanwhile the both CRT and proposed method had similar average SSIM value of 0.9979 and 0.9960 respectively in term of image quality. The result showed that the proposed method was able to improve the robustness and maintaining the image quality.

Highlights

The increasing number of digital media violation has increased the concern about the digital media protection
This paper proposed a new watermarking scheme through dual band Integer Wavelet Transform (IWT) to improve the robustness and preserving the image quality
This paper is proposed a new approach to embed the watermark on the integer wavelet domain using Chinese Remainder Theorem (CRT) algorithm

Summary

INTRODUCTION

The increasing number of digital media violation has increased the concern about the digital media protection. Spatial domain method is mean of embedding the watermark on the image pixels directly and it has lower complexity but less in robustness. The transform domain methods are embeds the watermark on the transformed pixels called coefficient in various frequency levels. They have better robustness for retaining the watermark [2]. Several development of watermarking in transform domain methods have been conducted such Discrete Cosine Transform (DCT) [3]-[5]. It is developed from the DWT using various lifting scheme to reserve the floating point within the range of integer value. This paper is proposed a new approach to embed the watermark on the integer wavelet domain using Chinese Remainder Theorem (CRT) algorithm. The CRT is work on integer range that corresponds with the IWT and has lower requirement in space and complexity which can streamline the process

RESEARCH METHOD

RESULT

CONCLUSION