Keyphrases
- frequency domain
- spatial domain
- discrete fourier transform
- fast fourier transform
- fourier analysis
- fourier transform
- directional filtering
- cross correlation
- power spectrum
- denoising
- data hiding
- low frequency
- subband
- feature extraction
- spectrum analysis
- filter bank
- spread spectrum
- fourier domain
- jpeg images
- frequency analysis
- wavelet transform
- transform domain
- low pass
- power spectra
- secret message
- frequency domain analysis
- frequency response
- radon transform
- multiresolution
- high quality