Keyphrases
- image watermarking
- principal component analysis
- singular value decomposition
- spread spectrum
- discrete wavelet transform
- jpeg compression
- color images
- watermarking algorithm
- geometric attacks
- dimensionality reduction
- geometric distortions
- watermarking scheme
- digital watermarking
- lossy compression
- face recognition
- watermark embedding
- image regions
- feature extraction
- copyright protection
- additive noise
- feature space
- face images
- digital images
- multiresolution