Keyphrases
- data hiding
- vector quantization
- error correction
- secret message
- reversible data hiding
- spread spectrum
- spatial domain
- high capacity
- image compression
- data hiding scheme
- information hiding
- watermarking technique
- image coding
- secret data
- jpeg images
- vector quantizer
- cover image
- data embedding
- frequency domain
- structural similarity
- halftone images
- b tree
- wavelet transform