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像素不扩展视觉密码的边缘增强研究 (Edge Enhancement on Size Invariant Visual Cryptography).

Hao HuBin YuGang Shen
Published in: 计算机科学 (2015)
Keyphrases
  • edge enhancement
  • visual cryptography
  • noise reduction
  • anisotropic diffusion
  • fourier analysis
  • secret sharing scheme
  • co occurrence
  • fourier transform
  • signal to noise ratio
  • noise level