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Reduce shadow size in aspect ratio invariant visual secret sharing schemes using a square block-wise operation.

Ching-Nung YangTse-Shih Chen
Published in: Pattern Recognit. (2006)
Keyphrases
  • aspect ratio
  • block wise
  • secret sharing scheme
  • perspective projection
  • bounding box
  • camera parameters
  • camera calibration
  • focal length
  • image processing
  • key management