Expression image preprocessing based on wavelet transform.
Changqin QuanXiaoming XuFuji RenPublished in: ROBIO (2014)
Keyphrases
- image preprocessing
- wavelet transform
- feature extraction
- multiresolution
- image enhancement
- subband
- image compression
- connected component analysis
- preprocessing step
- multiscale
- wavelet coefficients
- high frequency
- image processing
- color images
- principal component analysis
- preprocessing
- feature space
- pattern recognition
- iris recognition