[论文解读] Odd-Even Embedding Scheme Based Modified Reversible Watermarking Technique using Blueprint

Arijit Kumar Pal, Poulami Das+1 more|arXiv (Cornell University)|Mar 24, 2013

Advanced Steganography and Watermarking Techniques参考文献 7被引用 9

一句话总结

本文提出了一种新颖的可逆水印技术，结合奇偶嵌入方案与基于蓝图的方法，实现了高数据隐藏容量和优异的图像质量。通过利用像素对操作和蓝图生成过程，该方案确保了原始图像的无损恢复，并在嵌入数据量变化时始终保持约51 dB的一致水印质量。

ABSTRACT

Digital watermarking is a technique of information adding or information hiding in order to identify the owner of the data in multimedia content. It seems that a signal or digital image can permanently embed over another digital data providing a good way to protect intellectual property from illegal replication. The cover data that is transmitted through the internet hides the watermark in a computer aided assertion method such that it becomes undetectable. Finally it stands as a hindrance over many operations without harming the embedded host document. Unfortunately, many owners of the digital materials such as images, text, audio and video are reluctant to the spreading of their documents on the web or other networked environment, because the ease of duplicating digital materials facilitates copyright violation. Digital media distribution occurs through various channels. The cover data may or may not hold any relation with the watermark information. In the last two decades, a considerable amount of research has been done on the digital watermarking of multimedia files such as audio, video, images and text. Different type of watermarking algorithms has been proposed by the researchers to achieve high level of security and authenticity. In our proposed method, a modified reversible watermarking technique is introduced, which employs a blueprint generation of original image based on odd-even embedding methodology to yield large data hiding capacity, security as well as high watermarked quality. The experimental results demonstrate that, no matter how much secret data is embedded, the watermarked quality is about 51dB in this proposed scheme.

研究动机与目标

• 解决现有可逆水印技术中数据隐藏容量低和图像质量差的挑战。
• 提升多媒体内容（如图像、音频和视频）数字水印的安全性与鲁棒性。
• 在水印提取后实现原始图像的无损恢复，确保数据完整性。
• 无论嵌入数据量多少，均实现一致的高质量水印图像。
• 开发一种支持大容量数据嵌入同时保持不可见性的方法。

提出的方法

• 该方法采用奇偶嵌入方案，根据像素对的奇偶性对其进行修改以嵌入秘密数据。
• 利用奇偶嵌入过程生成原始图像的蓝图，以指导数据嵌入与提取。
• 通过调整像素值的方式嵌入水印，从而保留原始图像结构以实现无损恢复。
• 该方案使用可逆变换，确保在水印提取后可完美重建原始图像。
• 蓝图作为参考图，用于在提取后将像素值恢复至原始状态。
• 通过最小化失真确保高图像质量，实现约51 dB的稳定PSNR。

实验结果

研究问题

• RQ1 如何在不损害图像质量的前提下最大化可逆水印中的数据隐藏容量？
• RQ2 基于蓝图的方法能否提高水印嵌入与提取的准确性和可逆性？
• RQ3 使用奇偶嵌入方法在嵌入大量秘密数据时，可达到的图像质量（PSNR）是多少？
• RQ4 所提出的方法如何确保在水印提取后实现原始图像的无损恢复？
• RQ5 奇偶嵌入方案在可逆水印中在多大程度上提升了安全性与不可见性？

主要发现

• 所提出的方案在无论嵌入数据量多少的情况下，均实现了约51 dB的一致水印图像质量。
• 奇偶嵌入机制通过高效利用像素对关系，实现了高数据隐藏容量。
• 蓝图生成过程确保了水印提取后原始图像的精确且可逆的重建。
• 该方法保持了水印的不可见性，这一点由51 dB的高PSNR值得到证实。
• 该方案支持原始图像的无损恢复，因此适用于对数据完整性有要求的应用。
• 实验结果证实了该方法在各种数据嵌入负载下的鲁棒性与可靠性。