Keyphrases
- watermarking algorithm
- dct coefficients
- barcode
- jpeg compression
- signal processing
- singular value decomposition
- color images
- image watermarking
- watermarking scheme
- copyright protection
- wavelet domain
- digital watermarking
- lossy compression
- jpeg images
- spread spectrum
- digital image watermarking
- dct domain
- geometric distortions
- geometric attacks
- pattern recognition
- watermarking technique
- image authentication
- singular values
- black and white
- image blocks
- image regions
- gray level
- denoising
- image processing