Keyphrases
- shift invariant
- sparse coding
- wavelet domain
- wavelet coefficients
- shift variant
- rotation invariant
- image classification
- discrete wavelet transform
- blurred images
- sparse representation
- linear combination
- image representation
- natural images
- multiscale
- unsupervised learning
- image processing
- noise reduction
- generative model
- edge preserving
- signal processing
- least squares