A dual voltage-frequency VLSI chip for image watermarking in DCT domain.
Saraju P. MohantyNagarajan RanganathanKarthikeyan BalakrishnanPublished in: IEEE Trans. Circuits Syst. II Express Briefs (2006)
Keyphrases
- image watermarking
- dct domain
- low frequency
- dct coefficients
- watermark detection
- jpeg compression
- discrete wavelet transform
- watermarking algorithm
- high frequency
- spatial domain
- spread spectrum
- additive noise
- transform domain
- signal processing
- discrete cosine transform
- frequency domain
- compressed domain
- digital video
- post processing
- human visual system
- geometric distortions
- watermarking technique
- copyright protection
- watermarked image
- reference frame
- wavelet domain
- lossy compression
- digital watermarking
- wavelet coefficients
- feature vectors
- subband
- visual quality
- digital images
- wavelet transform
- multiresolution