Reversible Watermarking by Difference Expansion
Reversible Watermarking by Difference Expansion
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发表时间：
2002
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通讯作者：
Tian Jun;Reversible Watermarking
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作者：
Tian Jun;Reversible Watermarking
可逆水印技术是近年来研究的热点。与其他类型的数字水印不同，可逆水印具有能够完全恢复原始数字内容的特点。提出了一种基于差分扩展的大容量、高质量可逆水印算法。我们的方法和其他方法之间的一个显著区别是，我们不需要压缩嵌入区域的原始值。我们探索数字内容中的冗余，以实现可逆性。
Reversible watermark has drawn lots of interest recently. Different from other types of digital watermarks, a reversible watermark has a special feature that the original digital content can be completely restored. In this paper we describe a high capacity and high quality reversible watermarking method based on difference expansion. A noticeable difference between our method and others is that we do not need to compress original values of the embedding area. We explore the redundancy in the digital content to achieve reversibility.