Reversible Text Watermarking Algorithm Using Prediction-error Expansion Method
Wenbin Fei, Xianghong Tang · 2013
In order to avoid the permanent change of the text content caused by watermark embedding, this paper proposes a reversible watermarking algorithm for Chinese text document using prediction-error expansion.The algorithm takes the sentence as the unit, through the context collocation degree to select the words that can be replaced, using prediction-error expansion and chaos sequence to realize embedding.Results show that this algorithm not only has the higher security, but also can extract watermark effectively, and restores the original text intact.