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Aspect ratio invariant visual cryptography by image filtering and resizing.
Ching-Nung Yang
Pin-Wei Chen
Hsiang-Wen Shih
Cheonshik Kim
Published in:
Pers. Ubiquitous Comput. (2013)
Keyphrases
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image filtering
aspect ratio
visual cryptography
secret sharing scheme
image restoration
perspective projection
camera parameters
focal length
edge detection
invariant features
camera calibration
high quality
bounding box