Towards Practical Self-Embedding for JPEG-Compressed Digital Images
Towards Practical Self-Embedding for JPEG-Compressed Digital Images
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DOI：
10.1109/tmm.2014.2368696
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发表时间：
2015-02
影响因子：
7.3
通讯作者：
Pawel Korus;Jaroslaw Bialas;A. Dziech
中科院分区：
文献类型：
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作者：
Pawel Korus;Jaroslaw Bialas;A. Dziech
设计了一种实用的JPEG图像有损压缩自恢复机制。我们扩展了最近提出的数字喷泉码的基础上的内容重建问题的模型，考虑到新兴的水印提取和块分类错误的影响。与现有的方法相比，我们的方案保证了高水平和稳定的重建质量。而不是引入重建文物，新兴的水印提取错误惩罚可实现的篡改率。我们引入了新的机制，可以有效地处理高分辨率和彩色图像。为了分析我们的方案的行为，我们推导出一个改进的模型来计算重建成功概率。我们引入了一种新的混合机制，用于在整个图像上传播参考信息，这使得可以在可实现的篡改率和计算复杂度之间找到一个很好的平衡。这种方法将水印嵌入时间从几分钟的量级减少到单秒的量级，即使在移动的设备上也是如此。
This paper deals with the design of a practical self-recovery mechanism for lossy compressed JPEG images. We extend a recently proposed model of the content reconstruction problem based on digital fountain codes to take into account the impact of emerging watermark extraction and block classification errors. In contrast to existing methods, our scheme guarantees a high and stable level of reconstruction quality. Instead of introducing reconstruction artifacts, emerging watermark extraction errors penalize the achievable tampering rates. We introduce new mechanisms that allow for handling high-resolution and color images efficiently. In order to analyze the behavior of our scheme, we derive an improved model to calculate the reconstruction success probability. We introduce a new hybrid mechanism for spreading the reference information over the entire image, which allows to find a good balance between the achievable tampering rates and the computational complexity. Such an approach reduced the watermark embedding time from the order of several minutes to the order of single seconds, even on mobile devices.