Keyphrases
- frequency domain
- facial asymmetry
- feature extraction
- expression classification
- spatial domain
- fourier transform
- power spectral
- cross correlation
- facial expression recognition
- power spectrum
- feature space
- power spectra
- facial expressions
- subband
- affine invariance
- fast fourier transform
- fourier domain
- feature vectors
- facial features
- frequency response
- frequency analysis
- spectrum analysis
- denoising
- face images
- face recognition
- phase correlation
- fourier analysis
- human faces
- frequency domain analysis
- multiscale