An overcomplete dictionary design algorithm for sparse representation of piecewise stationary signals.
Tianjing WangBaoyu ZhengZhen YangPublished in: APCC (2012)
Keyphrases
- sparse representation
- sparse signal representation
- negative matrix factorization
- reconstruction error
- dictionary learning
- orthogonal matching pursuit
- sparse reconstruction
- learning algorithm
- face recognition
- sparse coding
- test images
- sparse coefficients
- signal processing
- regularized least squares
- k means
- compressed sensing
- joint optimization
- image super resolution
- image classification
- sparse approximations
- piecewise smooth
- sparsity constraints
- low rank matrix recovery
- image patches
- image representation
- natural images
- expectation maximization
- blind source separation
- data sets
- object tracking
- linear combination
- input data
- dimensionality reduction
- sparse representation based classification
- face images
- nearest neighbor
- image data
- neural network