[A medical image authentication method based on restorable watermarking].
In this paper, a restorable watermarking algorithm is proposed for medical image content authentication. Important DWT coefficients are chosen to be coded with the SPIHT algorithm for generating watermarking. The improved security watermark scrambled by Arnold transformation was then embedded into the lower bits of the image data. Finally, the chain structure was used to detect the watermarking and identify the altered positions. The altered data in an image was restored by SPIHT decoding. The experimental results demonstrated that the watermarked image not only possessed good perceptual transparence but also allowed location and restoration of the tampered content.
Gong
Jian
J
Institute of Medical Information &Technology, Southern Medical University, Guangzhou 510515, China. gj33@ fimmu.com
Zhong
Xiao-Yan
XY
Feng
Qian-Jin
QJ
D000465:Algorithms; D001698:Biomedical Engineering; D016494:Computer Security; D003952:Diagnostic Imaging / Q000592:standards* / Q000706:statistics & numerical data; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D016347:Medical Records Systems, Computerized / Q000458:organization & administration / Q000592:standards*