逐像素纹理合成的生成式信息隐藏  

Generating information hiding through pixel-by-pixel texture synthesis

作　　者：赵艺 邵利平[1] ZHAO Yi;SHAO Li-ping(School of Computer Science,Shaanxi Normal University,Xi'an,710119)

机构地区：[1]陕西师范大学计算机科学学院,陕西西安710119

出　　处：《光电子．激光》2020年第3期334-344,共11页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61100239);陕西省自然科学基金(2011JQ8009,2016JM6065,2020JM-301);陕西省重点研究计划项目(2020GY-269);中央高校基本科研业务费基金(GK201402036,GK201703057)资助项目。

摘　　要：修改式信息隐藏会对嵌密载体视觉质量造成较大影响且易留下修改痕迹;纹理构造式信息隐藏生成的都是非自然纹理;纹理拼接式信息隐藏由给定样例图产生类自然纹理,通过缝合线算法来拼接纹理小块,不可避免地会产生缝合痕迹和重复纹理模式,从而不能对秘密信息进行掩盖。针对以上问题,提出逐像素纹理合成的生成式信息隐藏。在嵌密时,首先将秘密信息编码为密钥图像上的坐标以避免秘密信息直接信道传输,其次引入多备份,将坐标进一步编码为给定样例图像的高频颜色序列,并由密钥伪随机放置在空白待合成纹理图像上,最后按逐像素纹理合成策略来生成含密纹理图像。在提取时,根据密钥提取颜色序列,然后结合多备份区间扩展策略由样例图像恢复坐标并依据密钥图像提取秘密信息。理论和实验表明,所提方法通过逐像素纹理合成,不会留下明显拼接痕迹和重复模式且秘密信息完全依赖于密钥,具备一定的抗攻击能力和较高的安全性。Modification based information hiding method affected visual quality of the embedded carrier and always leaves modification traces.Texture construction based information hiding always produces non-natural textures.Texture synthesis hiding generated texture blocks by a sample image and then stitched these blocks together by image quilting.However,it inevitably produces stitching traces and repetition texture patterns to reveal the hidden secret information.To solve these problems,generating information hiding through pixel-by-pixel texture synthesis was proposed.In embedding,secret information was firstly coded into coordinates of a key image to avoid the direct channel transmission of secret information.Secondly,these coordinates were further transformed into a high-frequency color sequence with multiple backups in the given sample image and then placed randomly into a blank stego texture image to be synthesized.Finally,according to pixel-by-pixel texture generation strategy to produce the synthesized stego texture image.In extraction,the high-frequency color sequence was extracted firstly according to the user key,and then coordinates of the key image were recovered to fetch the secret information combined with strategy of multiple backups and interval extension.Theory and experiment show that the proposed method does not leave any evident stitching trace and the repetition patterns by pixel-by-pixel texture synthesis.The secret information is utterly dependent on the user key.It has some anti-attack abilities and has high security.

关 键 词：生成式隐藏 逐像素纹理合成 图像缝合线 样例图 密钥图像 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]