SHEN Yanbin.Medical image zero - watermarking algorithm based on Contourlet domain feature points[J].Journal of Yanbian University,2022,(03):246.
基于Contourlet域特征点的医学图像零水印算法
- Title:
- Medical image zero - watermarking algorithm based on Contourlet domain feature points
- 文章编号:
- 1004-4353(2022)03-0246-05
- 关键词:
- Contourlet; SIFT; 零水印; 感兴趣区域
- Keywords:
- Contourlet; SIFT; zero - watermark; region of interest
- 分类号:
- TP309.7
- 文献标志码:
- A
- 摘要:
- 针对医学图像在传输过程中有可能泄露患者信息的问题,提出一种基于Contourlet域特征点的零水印算法.该算法首先对图像进行Contourlet分解,以此得到低通图像; 然后在低通图像中提取出SIFT特征点,并根据特征点的分布自动定位感兴趣区域(ROI); 最后筛选出一定数量的特征点,以生成特征向量用于水印嵌入.实验结果表明,该算法在抵抗高斯噪声、 JPEG压缩、旋转、缩放、剪切等攻击时具有很好的鲁棒性,可有效保护医学图像中的信息.
- Abstract:
- Aiming at the problem that patient's information may be leaked in the process of medical image transmission, a zero - watermarking algorithm based on Contourlet domain feature points was proposed.The algorithm will not affect the quality of the original medical image, and can embed large capacity watermark information.Firstly, Contourlet decomposition is applied to the image to obtain the lowpass image.Then, SIFT feature points are extracted from the lowpass image and the region of interest(ROI)is automatically located according to the distribution of feature points.Finally, a certain number of feature points are screened out to generate feature vectors for watermark embedding.Experimental results show that the algorithm has good robustness against Gaussian noise, JPEG compression, rotation, scaling, shearing and other attacks, so it can effectively protect the information hiding in medical images.
参考文献/References:
[1] NARIMA Z, AMINE K, REDOUANE K, et al.Robust SVD - based schemes for medical image watermarking[J].Microprocessors and Microsystems, 2021,84(10):104134.
[2] CHEN L X, BAI W T, YAO Z Q.A secure and privacy - preserving watermark based medical image sharing method[J].Chinese Journal of Electronics, 2020,29(5):819 - 825.
[3] 孙俞超,李德.基于图像归一化和NSST的鲁棒零水印算法[J].延边大学学报(自然科学版),2017,43(1):43 - 50.
[4] ZHANG S, GAO T G, GAO L.A novel encryption frame for medical image with watermark based on hyperchaotic system[J].Mathematical Problems in Engineering, 2014(1):1 - 11.
[5] AHERRAHROU N, TAIRI H.PDE based scheme for multi - modal medical image watermarking[J].Biomedical Engineering Online, 2015(14):1 - 19.
[6] 陈青,宗偲琦.用于医学图像认证的Contourlet - SVD双水印算法[J].小型微型计算机系统,2019,40(1):205 - 209.
[7] DO M N, VETTERLI M.The contourlet transform: an efficient directional multiresolution image representation[J].IEEE Transactions on Image Processing, 2006,14(12):2091 - 2106.
[8] DO M N, VETTERLI M.Framing pyramids[J].IEEE Transactions on Signal Processing, 2003,51(9):2329 - 2342.
[9] 楼偶俊.基于Contourlet域特征点的抗几何攻击水印方法[J].计算机研究与发展,2010,47(1):113 - 120.
[10] LOWE D G.Distinctive image features from scale - invariant keypoints[J].International Journal of Computer Vision, 2004,2(60):91 - 110.
[11] 沈炎斌.基于SIFT特征点的三维医学图像零水印算法[J].贵州大学学报(自然科学版),2020,37(6):92 - 96.
备注/Memo
收稿日期: 2022-01-16
基金项目: 福建省中青年教师教育科研项目(JT180810)
作者简介: 沈炎斌(1983—),男,硕士,讲师,研究方向为数字水印、图像处理等.