A general framework for shiftable position-based dual-image reversible data hiding

Heng Yao,Chuan Qin,Zhenjun Tang,Xinpeng Zhang

doi:10.1186/s13640-018-0281-y

Abstract

This paper proposes an improved method for shiftable position-based dual-image reversible data hiding. During the procedure of embedding data, the total number of shiftable coordinates is set as the parameter to make a trade-off between distortion and embedding rate. First, the optimal parameter is sought and the one-to-one code table is generated according to the expected embedding rate. Then, the message data is embedded into the cover image through a simple and effective code table lookup scheme to generate two visually similar stego images. During the procedure of data extraction, the message can be extracted in a reverse manner. The experimental results demonstrate that the proposed method has higher PSNR (peak signal-to-noise ratio) values than our previous work in the case of high embedding rates.

Highlights

Reversible data hiding (RDH) is a technique to embed message bits into a cover image in a reversible manner
The first difference expansion (DE) method was proposed by Tian [1], where integer wavelet transform was first conducted on the cover image to generate difference values, and the difference values were expanded to create the space for embedding the secret data
4 Results and discussion To demonstrate the efficacy of the proposed method, we compared our method with some state-of-the-art dual-image RDH methods [28, 31, 32]

Summary

Introduction

Reversible data hiding (RDH) is a technique to embed message bits into a cover image in a reversible manner. We propose a novel code-mapping-based dual-image RDH method by using the maximum allowable position number as the parameter to make a trade-off between capacity and distortion, and we further integrate a general framework to select the optimal parameter adaptively.

Results

Conclusion