结合高色彩相似度预处理的压缩域隐写算法  

Compressed domain steganography algorithm for high color similarity preprocessing

作　　者：赵嘉琪 赵琰 孔水玲 ZHAO Jia-qi;ZHAO Yan;KONG Shui-ling(College of Electronics and Information Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Guangxi Key Lab of Multi-Source Information Mining and Security,Guangxi Normal University,Guilin 541004,China)

机构地区：[1]上海电力大学电子与信息工程学院,上海200090 [2]广西师范大学广西多源信息挖掘与安全重点实验室,广西桂林541004

出　　处：《计算机工程与设计》2023年第3期714-724,共11页Computer Engineering and Design

基　　金：国家自然科学基金项目(61802250);上海市科委部分地方院校能力建设基金项目(20020500700);广西多源信息挖掘与安全重点实验室开放基金项目(MIMS18-04)。

摘　　要：为提高图像隐写算法的载荷能力,增强载体的嵌入容量,提出一种结合高色彩相似度预处理的压缩域隐写算法。对图像进行预处理,利用超像素分割(SLIC)将图像根据内容进行分块,该分块方式具有空间接近度低、色彩相似度高的特点,增强图像的载荷能力;利用改进后的AMBTC压缩编码算法对形状和大小不规则的超像素块进行重新编码并嵌入秘密信息。通过设计率失真实验和有效性实验,验证了该预处理算法对提高嵌入容量的有效性。To improve the load capacity of image steganography algorithm and enhance the embedding capacity of carrier,a compression domain steganography algorithm combined with high color similarity pre-processing was proposed.The image was pre-processed.Simple linear clustering(SLIC)was used to block the image according to the content.The block method showed the characteristics of low spatial proximity and high color similarity,and the load capacity of the image was enhanced.The improved absolute moment block truncation coding(AMBTC)compression algorithm was used to re-encode the irregular shape and size of the superpixel blocks and embed the secret information.Through design rate distortion experiment and validity experiment,the effectiveness of the pre-processing algorithm to improve the embedding capacity is verified.

关 键 词：图像隐写 高色彩相似度 预处理 SLIC分割 压缩域 AMBTC压缩编码 高嵌入容量 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]