加密域灰度半色调图像的可逆信息隐藏  

Reversible Information Hiding of Grayscale Halftone Images in Encrypted Domain

作　　者：孙玉霞 SUN Yuxia(Shandong Foreign Affairs Vocational University,Weihai 264504,China)

机构地区：[1]山东外事职业大学,山东威海264504

出　　处：《数字通信世界》2024年第2期63-65,共3页Digital Communication World

摘　　要：文章提出一种针对半色调图像的可逆信息隐藏算法,鉴于半色调图像信息冗余少的缺点,在嵌入水印前将载体图像的像素复制到两个相同的图像中,人为增加冗余。通过使用校验子编码来改变图像中的像素,将水印嵌入到第一个载体图像中;通过位替换,将水印嵌入到第二个载体图像中,得到两个隐秘图像。在提取阶段,先通过汉明码的校验矩阵处理第一个隐秘图像获得水印信息,并与第二个隐秘图像中的像素进行位替换,便可恢复载体图像。本方案适用于可逆性至关重要的数据隐藏应用场景,如印刷打印领域。The article proposes a reversible information hiding algorithm for halftone images.Considering the disadvantage of low information redundancy in halftone images,the pixels of the carrier image are copied into two identical images before embedding the watermark,artificially increasing redundancy.By using checksum encoding to change the pixels in the image,the watermark is embedded into the first carrier image;By bit substitution,the watermark is embedded into the second carrier image to obtain two hidden images.In the extraction stage,the watermark information is first obtained by processing the first hidden image using the Hamming code's verification matrix,and then bit swapped with the pixels in the second hidden image to restore the carrier image.This scheme is suitable for data hiding applications where reversibility is crucial,such as in the field of printing and printing.

关 键 词：图像加密 可逆信息隐藏 矩阵嵌入 双重图像 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]