A Robust Binary Text Digital Watermarking Algorithm for Print-Scan Process

@article{He2009ARB,
  title={A Robust Binary Text Digital Watermarking Algorithm for Print-Scan Process},
  author={Bin He and Yuqian Wu and Kai Kang and Wei Guo},
  journal={2009 WRI World Congress on Computer Science and Information Engineering},
  year={2009},
  volume={7},
  pages={290-294}
}
Considering the simple and weak structure of  binary texts, this paper  proposes a novel algorithm which combines the methods of Block Partition, Discrete Cosine Transform (DCT) and  pixel  flipping. Based on appropriate block partition, the matrix of each block's characteristic values is transformed into the DCT domain, and a DCT coefficient matrix generated. Then, some high-frequency DCT coefficients are modified according to a threshold. Depending on the change of characteristic values… CONTINUE READING

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