Extended DCT Domain for Improving the Quality of Watermarked Image.
Ta Minh ThanhNguyen Trung ThanhPublished in: KSE (2015)
Keyphrases
- dct domain
- spatial domain
- watermark detection
- discrete cosine transform
- dct coefficients
- transform domain
- compressed domain
- jpeg compression
- watermarked image
- human visual system
- post processing
- watermarking technique
- quantization step
- spread spectrum
- frequency domain
- wavelet domain
- low frequency
- watermarking scheme
- copyright protection
- high quality
- digital video
- digital watermarking
- digital images
- additive noise
- singular values
- watermarking algorithm
- data hiding
- reference frame
- image blocks
- gray scale