Keyphrases
- similarity retrieval
- encryption scheme
- image compression
- lossless compression
- compression ratio
- similarity search
- wavelet transform
- hash functions
- ciphertext
- compression algorithm
- public key
- data sharing
- secret key
- image processing
- similarity queries
- image retrieval
- similarity measure
- metric space
- data mining
- multi dimensional
- motion estimation
- multiscale
- image sequences
- information retrieval