Keyphrases
- jpeg compression
- watermarking algorithm
- image authentication
- image watermarking
- digital images
- discrete wavelet transform
- dct coefficients
- watermarking scheme
- additive noise
- jpeg images
- gaussian noise
- quantization step
- peak signal to noise ratio
- image features
- multiresolution
- pattern recognition
- multiscale
- image restoration
- feature vectors
- video sequences