图像信息隐藏技术的研究与实现-翻译.docVIP

外文文献资料 收集：苏州大学应用技术学院 10电子 班级（学号1016405040）［姓名］张伟伟 The development of teleradiology brings the convenience of global medical record access along with the concerns over the security of medical images transmitted over the open network. With the prevailing adoption of three-dimensional (3-D) imaging modalities, it is vital to develop a security mechanism to provide large volumes of medical images with privacy and reliability. This paper presents the development of a new and improved method of implementing tamper detection and localization based on a fully reversible digital watermarking scheme for the protection of volumetric DICOM images. This tamper detection and localization method utilizes the 3-D property of volumetric data to achieve much faster processing time at both sender and receiver sides without compromising tamper localization accuracy. The performance of the proposed scheme was evaluated by using sample volumetric DICOM images. Results show that the scheme achieved on average about 65 % and 72 % reduction in watermarking and dewatermarking processing time, respectively. For cases where the images had been tampered, it is possible to detect and localize the tampered areas with improved localization resolution in the images using the scheme. Keywords:Image authentication, Medical data security, Tamper detection, Watermarking Introduction Digital medical image has gained importance over the years and has become the primary medium for medical imaging in the healthcare industry. In parallel with the advent of digital medical images, rapid development of information and communication technology has facilitated the advancement of teleradiology by enabling faster and wider access to electronic medical records, including medical images. With increasing demand by medical experts at different locations to study medical images from people all over the globe in teleradiology, an increasing number of medical images are being transmitted through the open network (e.g.