利用秘密图像和封面图像之间的相似性，提高数字隐写术的嵌入效率（multimedia）---用户6869393

数码隐写术正成为保护敏感通讯的常用工具，在防止罪案/恐怖主义等不同的应用方面，执法人员需要远端比较在罪案现场拍摄的面部图像与已知罪犯/疑犯的面部数据库;在敌对环境/情况下交换军事地图或监视录像;在储存或交换病人的医疗影像/纪录时，保障医疗系统的私隐;并防止未经授权的用户非法获取银行客户的帐户/记录。现有的在封面图像文件中嵌入秘密图像的数字隐写方案往往不利用秘密图像比特流中的各种冗余来处理对嵌入容量、隐写图像质量和不可检测性的各种相互冲突的要求。本文研究开发了一种新颖的图像处理程序和数据隐藏方案，利用并增加了秘密图像比特流与覆盖图像LSB平面之间的相似性。这将通过两个新的步骤来实现，包括在嵌入之前对秘密图像和封面图像进行操作，从而在秘密图像比特流和封面图像LSB平面中实现更高的0:1比例。利用上述两步策略，利用位平面映射技术代替位平面替换，使每个覆盖像素可用于秘密嵌入。我们将证明，该策略生成的隐写字图像失真最小，嵌入效率高，相对于3种著名的目标隐写字分析工具具有良好的隐写字图像质量和鲁棒性。

原文题目：Improving Embedding Efficiency for Digital Steganography by Exploiting Similarities between Secret and Cover Images

原文：Digital steganography is becoming a common tool for protecting sensitive communications in various applications such as crime/terrorism prevention whereby law enforcing personals need to remotely compare facial images captured at the scene of crime with faces databases of known criminals/suspects; exchanging military maps or surveillance video in hostile environment/situations; privacy preserving in the healthcare systems when storing or exchanging patient’s medical images/records; and prevent bank customers’ accounts/records from being accessed illegally by unauthorized users. Existing digital steganography schemes for embedding secret images in cover image files tend not to exploit various redundancies in the secret image bit-stream to deal with the various conflicting requirements on embedding capacity, stego-image quality, and undetectibility. This paper is concerned with the development of innovative image procedures and data hiding schemes that exploit, as well as increase, similarities between secret image bitstream and the cover image LSB plane. This will be achieved in two novel steps involving manipulating both the secret and the cover images, prior to embedding, to achieve higher 0:1 ratio in both the secret image bit-stream and the cover image LSB plane. We exploit the above two steps strategy to use a bit-plane(s) mapping technique, instead of bit-plane(s) replacement to make each cover pixel usable for secret embedding. We shall demonstrate that this strategy produces stego-images that have minimal distortion, high embedding efficiency, reasonably good stego-image quality and robustness against 3 well-known targeted steganalysis tools.

原文作者：Alan A. Abdulla, Harin Sellahewa, Sabah A. Jassim

原文链接：https://arxiv.org/abs/2004.11974