Multipurpose Watermarking Algorithm for Medical Images

Shaozhang Xiao,Zhengwei Zhang,Yue Zhang,Changhui Yu

doi:10.1155/2020/8848885

Shaozhang Xiao, Zhengwei Zhang + Show 2 more

Open Access

https://doi.org/10.1155/2020/8848885

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Journal: Scientific Programming	Publication Date: Sep 1, 2020
Citations: 8	License type: CC BY 4.0

Affiliation: Huaiyin Institute of Technology

Abstract

Considering the existing medical image watermarking algorithms, a single function often has limitations, and a multipurpose watermarking algorithm for medical images is proposed. First, medical images are divided into regions of interest (ROIs) and regions of noninterest (RONIs). Then, the authentication watermark produced for each subblock of the ROI is embedded into the corresponding mapping subblock. The visible watermark is embedded into the RONI, and, finally, the watermark information and constructed authentication information in each subblock of the ROI are embedded into the corresponding RONI subblock. Simulation results show that the embedded visible watermark can protect and facilitate medical image management. In addition, the proposed algorithm has strong robustness and very good visual quality. It can simultaneously realize copyright protection and content authentication and also has high tamper localization capability.

Highlights

In early image watermarking algorithms, a single watermark is embedded into the original image to provide copyright protection [1]
E visible watermark to be embedded is composed of medical image identification and basic information, and the robust watermark is composed of basic patient information and diagnostic information (Figure 12). e experiment focuses on the reversibility of the algorithm, the visual quality of the watermarked image, the accuracy of tamper detection, and the accuracy of regional positioning
On the basis of the digital signature can the receiver extract the invisible watermark by using the key. erefore, the analysis of the experimental results in this paper is based on medical images with visible watermark as the carrier images

Summary

Introduction

In early image watermarking algorithms, a single watermark is embedded into the original image to provide copyright protection [1]. With the further development of image watermarking technology, researchers found that embedding a single watermark into the original image for copyright protection and content integrity authentication is not very effective. Ye [8] proposed a dual-function watermarking based on copyright protection and content authentication. E experimental results reveal that the proposed framework offers high degree of robustness against single/ dual/triple attacks; the fragile watermark embedding makes the system capable of the tamper detection and localization with average bit error rate (BER) more than 45% for all signal processing/geometric attacks. A multipurpose watermarking with copyright protection and content authentication is proposed instead of an algorithm based on single watermarking or semifragile watermarking [18], which is imperfect for medical images and cannot provide good copyright protection and tamper localization. Because of the characteristics of medical images, completely restoring the ROI when the watermark is extracted is necessary. erefore, a reversible image watermarking is used to embed watermark in ROI. us, in this paper, a triple watermarking algorithm based on IWT, general difference extension, and image fusion is studied

Related Theory

Robust Watermark Embedding

Experimental Results and Analysis

Conclusions