Efficient Method for Content Reconstruction With Self-Embedding
Efficient Method for Content Reconstruction With Self-Embedding
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DOI：
10.1109/tip.2012.2227769
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发表时间：
2013-03
影响因子：
10.6
通讯作者：
Pawel Korus;A. Dziech
中科院分区：
文献类型：
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作者：
Pawel Korus;A. Dziech
提出了一种基于擦除通信信道的自嵌入系统内容重构问题的新模型。我们解释了为什么这样的模型很适合这个问题，以及如何通过使用数字喷泉代码来实际实现它。所提出的方法是基于在整个图像上传播参考信息的替代方法，这在最近的应用中被证明是至关重要的。本文对固有恢复权衡进行了理论分析。我们解析推导了重建成功边界的公式，并通过蒙特卡罗模拟和一个参考图像认证系统进行了实验验证。我们进行了详尽的重建质量评估，其中提出的参考方案在一个共同的评估方案中与五个最先进的替代方案进行了比较。我们的论文对如何构建自嵌入方案以实现最佳性能有重要的见解。根据提出的原则设计的参考认证系统允许高质量的重建，而不管篡改内容的数量。在10000张自然图像上测量的平均重建质量为37 dB，即使在50%的图像区域被篡改时也可以实现。
This paper presents a new model of the content reconstruction problem in self-embedding systems, based on an erasure communication channel. We explain why such a model is a good fit for this problem, and how it can be practically implemented with the use of digital fountain codes. The proposed method is based on an alternative approach to spreading the reference information over the whole image, which has recently been shown to be of critical importance in the application at hand. Our paper presents a theoretical analysis of the inherent restoration trade-offs. We analytically derive formulas for the reconstruction success bounds, and validate them experimentally with Monte Carlo simulations and a reference image authentication system. We perform an exhaustive reconstruction quality assessment, where the presented reference scheme is compared to five state-of-the-art alternatives in a common evaluation scenario. Our paper leads to important insights on how self-embedding schemes should be constructed to achieve optimal performance. The reference authentication system designed according to the presented principles allows for high-quality reconstruction, regardless of the amount of the tampered content. The average reconstruction quality, measured on 10000 natural images is 37 dB, and is achievable even when 50% of the image area becomes tampered.