Sparse representation or collaborative representation: Which helps face recognition?
Lei ZhangMeng YangXiangchu FengPublished in: ICCV (2011)
Keyphrases
- sparse representation
- face recognition
- feature representation
- image representation
- dictionary learning
- sparse coding
- sparsity constraints
- image classification
- compressive sensing
- random projections
- regularized least squares
- negative matrix factorization
- compressed sensing
- piecewise smooth
- joint optimization
- image patches
- reconstruction error
- object tracking
- subspace learning
- sparse approximations
- test images
- high dimensional data
- sparse representation based classification
- multiscale
- sparse coefficients
- signal processing
- dimensionality reduction
- feature extraction
- image features
- sparse codes
- sparse reconstruction
- facial expressions
- face images
- machine learning
- principal component analysis
- linear combination
- data mining