Reversible Watermarking in Medical Image Using RDWT and Sub-Sample

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Author(s): Lin Gao (Tianjin Chengjian University, China), Tiegang Gao (Nankai University, China)and Jie Zhao (Tianjin Chengjian University, China)
Copyright: 2020
Pages: 18
Source title: Cryptography: Breakthroughs in Research and Practice
Source Author(s)/Editor(s): Information Resources Management Association (USA)
DOI: 10.4018/978-1-7998-1763-5.ch029

Keywords: Cryptography / Cyber and Network Security / Information Science Reference / Security & Forensics

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Abstract

This paper proposed a reversible medical image watermarking scheme using Redundant Discrete Wavelet Transform (RDWT) and sub-sample. To meet the highly demand of the perceptional quality, the proposed scheme embedding the watermark by modifying the RDWT coefficients. The sub-sample scheme is introduced to the proposed scheme for the enhancement of the embedding capacity. Moreover, to meet the need of security, a PWLCM based image encryption algorithm is introduced for encrypting the image after the watermark embedding. The experimental results suggests that the proposed scheme not only meet the highly demand of the perceptional quality, but also have better embedding capacity than former DWT based scheme. Also the encryption scheme could protect the image contents efficiently.

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Reversible Watermarking in Medical Image Using RDWT and Sub-Sample

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