Data hiding for text document image authentication by connectivity-preserving

@article{Yang2005DataHF,
  title={Data hiding for text document image authentication by connectivity-preserving},
  author={Huijuan Yang and Alex ChiChung Kot},
  journal={Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005.},
  year={2005},
  volume={2},
  pages={ii/505-ii/508 Vol. 2}
}
A novel blind data hiding method for text document images is proposed; it aims to preserve the connectivity in a local neighborhood. The "flippability" of a pixel is determined by imposing three transition criteria in a 3/spl times/3 moving window which is centered at the pixel. The "embeddability" of a block is invariant in the watermark embedding process, while the "flipped" pixels can be located by imposing a constraint. The "uneven embeddability" of the host image is considered by embedding… CONTINUE READING
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IEEE Trans. Computers • 2002
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