基于二维直方图平移的可逆图像水印算法  

Reversible image watermark algorithm based on two-dimensional histogram shifting

作　　者：李丁盛 田丽华[1] 李晨[1] LI Ding-sheng;TIAN Li-hua;LI Chen(Software Engineering School,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学软件学院,陕西西安710049

出　　处：《计算机工程与设计》2018年第9期2867-2872,共6页Computer Engineering and Design

基　　金：国家自然科学基金项目(61403302);西安交通大学基本科研业务费基金项目(XJJ2016029)

摘　　要：针对如何检测灰度图像内容是否完整,提高认证图像的质量和水印隐蔽性问题,提出基于二维直方图平移的可逆图像水印算法。用左下两邻域预测差值计算方法解决图像在嵌入容量较大的情况下,水印隐蔽性和认证图像质量不高的问题。对比嵌入和提取水印的篡改检测方法定位出图像被篡改的区域,进一步增强图像完整性的认证。实验结果表明,在保持相同嵌入容量的情况下,该方法提高了含水印图像的质量,增强了水印的不可见性。In allusion to that how to detect whether the gray image is complete and to improve quality of authentication image and imperceptibility of watermark,a reversible image watermark algorithm based on two-dimensional histogram shifting was put forward.The prediction error calculation method of left-bottom two neighbors was used to solve the problem that the quality of the authentication image and imperceptibility of watermark are not high in the case of large embedded capacity.By comparing whet-her the extracted watermark was the same as that embedded,the tamper detection method located the tampered region and further improved the authentication of image integrity.Experimental results show that watermarked image quality and imperceptibility are improved when the embedded capacity is not changed.

关 键 词：认证图像 二维直方图平移 可逆水印 预测差值 篡改检测 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]