Keyphrases
- dct domain
- watermark detection
- video watermarking
- spatial domain
- transform domain
- dct coefficients
- post processing
- digital video
- spread spectrum
- compressed domain
- human visual system
- low pass filtering
- discrete cosine transform
- low frequency
- watermarking algorithm
- compressed images
- digital images
- image blocks
- data hiding
- watermarking scheme
- quantization step
- video transcoding
- jpeg images
- image resizing
- high frequency
- image compression
- high quality