自适应高容量医学图像可逆数据隐藏算法  

Adaptive high-capacity reversible data hiding algorithm for medical images

作　　者：黄斌[1] 史亮[2] 邓小鸿[3] 陈志刚[3] 

机构地区：[1]莆田学院电子信息工程学系,福建莆田351100 [2]厦门大学软件学院,福建厦门361005 [3]中南大学信息科学与工程学院,长沙410083

出　　处：《计算机应用》2012年第10期2779-2782,共4页journal of Computer Applications

基　　金：国家自然科学基金资助项目(61103202);国家重点实验室2011年度开放基金资助项目(SKLST201113);福建星火科技项目(2010S0017);莆田市科技项目(2011G04-2)

摘　　要：提出了一种新的医学图像无损数据隐藏算法,根据医学图像特点,将隐秘信息分别嵌入在感兴趣区域和非感兴趣区域中。在非感兴趣区域中,采用自适应整数变换方法增大嵌入容量并控制失真;在感兴趣区域,采用最低有效位替换方法控制水印图像质量。实验结果表明,算法的嵌入容量在1.2 bpp到1.7 bpp之间,而峰值信噪比保持在43 dB左右。与现有相关算法相比,嵌入容量具有明显优势并保持较高的图像质量。另外,本方法计算复杂度低,能方便应用于实际的医学信息系统中。A new reversible data hiding algorithm for medical images was proposed. The hidden information was embedded into Region Of Interest （ROI） and non-interest respectively. In ROI, an adaptive integer transform scheme was employed to enhance the embedding capacity and control distortions. And in Region of Non-Interest （RONI）, the classical Least Significant Bit （LSB） method was used to keep the marked image＇ s quality. The experimental results show that, compared with previous works, the performance of the proposed method has been significantly improved in terms of capacity and image quality. The proposed method＇ s embedding capacity is between 1.2 bpp and 1.7 bpp, while the Peak Signal-to- Noise Ratio （PSNR） can maintain the 43 dB or so. Moreover, the proposed method with high run efficiency can be applied into the practical hospital information system.

关 键 词：可逆数据隐藏 医学图像 整数变换 最低有效位 感兴趣区域 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]