| 一种基于可恢复性水印的医学图像认证方法 |
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| 引用本文： | 龚剑,钟晓燕,冯前进. 一种基于可恢复性水印的医学图像认证方法[J]. 南方医科大学学报, 2008, 28(6): 959-963 |
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| 作者姓名： | 龚剑 钟晓燕 冯前进 |
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| 作者单位： | 南方医科大学生物医学工程学院医学信息研究所,广东,广州,510515;南方医科大学生物医学工程学院医学信息研究所,广东,广州,510515;南方医科大学生物医学工程学院医学信息研究所,广东,广州,510515 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) , 国家自然科学摹金重点项目 |
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| 摘 要： | 本文提出了一种适用于医学图像内容认证和保护的可恢复性水印箅法.选取图像的小波重要系数进行SPIHT编码生成水印:使用Arnold变换确定其嵌入块位置并将其加密嵌入剑图像数据低位;通过链式认证结构实现水印信号的检测和图像篡改数据的定位,由 SPIHT解码完成篡改数据的恢复.实验表明,该算法在保证含水印医学图像具有良好视觉透明性的基础上.还可以定位并恢复被篡改区域内容.
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| 关 键 词： | 医学图像认证 图像数据恢复 小波变换 SPIHT编码 |
| 文章编号： | 1673-4254(2008)06-0959-04 |
| 修稿时间： | 2008-01-29 |
A medical image authentication method based on restorable watermarking |
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| GONG Jian,ZHONG Xiao-yan,FENG Qian-jin. A medical image authentication method based on restorable watermarking[J]. Journal of Southern Medical University, 2008, 28(6): 959-963 |
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| Authors: | GONG Jian ZHONG Xiao-yan FENG Qian-jin |
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| Affiliation: | Institute of Medical Information &Technology, Southern Medical University, Guangzhou 510515, China. gj33@ fimmu.com |
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| Abstract: | 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. |
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| Keywords: | medical image authentication image data restoration wavelet transform SPIHT encoding |
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