混合进制嵌入的调色板图像无损信息隐藏

doi:10.3969/j.issn.0255-8297.2015.06.007

应用科学学报 ›› 2015, Vol. 33 ›› Issue (6): 637-643.doi: 10.3969/j.issn.0255-8297.2015.06.007

混合进制嵌入的调色板图像无损信息隐藏

吕金鹏, 梁海华, 张新鹏

上海大学通信与信息工程学院, 上海 200444

收稿日期:2015-06-26 修回日期:2015-07-20 出版日期:2015-11-30 发布日期:2015-11-30
通信作者: 张新鹏,教授,博导,研究方向:多媒体信息安全,E-mail:xzhang@shu.edu.cn E-mail:xzhang@shu.edu.cn
基金资助:
国家自然科学基金(No.61472235)资助

Lossless Data Hiding in Palette Images Based on Mix-ary Codes

LÜ Jin-peng, LIANG Hai-hua, ZHANG Xin-peng

School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China

Received:2015-06-26 Revised:2015-07-20 Online:2015-11-30 Published:2015-11-30

摘要/Abstract

摘要： 提出了一种基于混合进制的调色板图像无损信息隐藏方法.首先根据索引分布,区分有效索引与冗余索引.在调色板中分配若干冗余索引指向同一有效索引的颜色,使相同颜色的不同索引值承载不同的秘密信息,用于无损信息隐藏.用动态规划方法产生最大嵌入量下的冗余索引分配方案.不同颜色承载的秘密信息为不同进制秘密数字.该方法中嵌入机制并不影响原始图像内容.实验表明,与以往方法相比,该方法提高了数据嵌入量,医学图像尤为显著.

关键词: 无损信息隐藏, 调色板图像, 混合进制, 动态规划

Abstract: This paper proposes a lossless data hiding method in palette images based on mix-ary codes. According to the distributionof indices, the indices are divided into effective indices and redundant indices. In the palette a certain number of redundant indices are mapped to the color of an effective index. Then the indices mapping to the same color stand for different secret digits in order to embed extra data losslessly. A dynamic programming algorithm is used to find the best allocation for redundant indices to achieve the highest embedding capacity. Embedded data subsets carried by different colors are different notational sequences. The data embedding operation does not affect the original image.Experiments showthat themethod has higher embedding capacity than previous methods, especially for medical images.

Key words: lossless data hiding, palette image, mix-ary code, dynamic programming

中图分类号:

TN911.73

吕金鹏, 梁海华, 张新鹏. 混合进制嵌入的调色板图像无损信息隐藏[J]. 应用科学学报, 2015, 33(6): 637-643.

LÜ Jin-peng, LIANG Hai-hua, ZHANG Xin-peng. Lossless Data Hiding in Palette Images Based on Mix-ary Codes[J]. Journal of Applied Sciences, 2015, 33(6): 637-643.

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混合进制嵌入的调色板图像无损信息隐藏

Lossless Data Hiding in Palette Images Based on Mix-ary Codes

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