基于直方图平移的医学图像可逆水印算法  

Reversible Watermarking Algorithm for Medical Image Based on Histogram Shifting

作　　者：刘芳[1] 金作林[2] 

机构地区：[1]北京电子科技学院,北京100070 [2]第四军医大学,陕西西安710032

出　　处：《电视技术》2013年第9期8-11,共4页Video Engineering

基　　金：国家自然科学基金项目(30973358);中办信息安全重点实验室青年科研基金项目(YQNJ0904)

摘　　要：结合医学图像特点,提出一种基于分块的灰度直方图平移水印算法。首先构建图像的灰度直方图,寻找峰值点和零值点;然后对图像分块,根据图像块的特点设定标志位;最后在指定的图像块内通过直方图变换来嵌入水印。实验结果表明,该算法不仅可以实现可逆水印,而且水印不可见性较好,嵌入容量较高,算法复杂度较低。该算法可以应用到信息隐藏、图像认证、隐秘传输等安全领域。The reversible watermarking algorithm is proposed based on histogram shifting and image blocking according to the properties of medical images. At first it constructes the gray histogram of image, finds the peak and zero point, then splits the image into blocks and set the flag. Finallly embedded the the watermark and shifted histogram in the particular image block. The test results show that the algorithm could implement reverablc watermarking with better invisibility, the capacity of watermark is good and the complexity of algorithm is low. This algorithm can be applied to information hiding, image authenticatoin,secrete information transfer and the related areas.

关 键 词：水印 可逆 直方图平移 医学图像 

分 类 号：TN911.73[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]