Keyphrases
- watermarking scheme
- wavelet domain
- image watermarking scheme
- multi channel
- image authentication
- multiscale
- watermarking algorithm
- watermark embedding
- similarity measure
- digital watermark
- spatial domain
- input image
- wavelet coefficients
- watermark detection
- image retrieval
- low level
- spread spectrum
- geometric distortions
- image data
- high frequency
- watermarked image
- wavelet decomposition
- denoising
- markov random field
- watermarking method
- natural images
- image segmentation
- geometric attacks