Online Signature Verification Based on DCT and Sparse Representation.
Yishu LiuZhihua YangLihua YangPublished in: IEEE Trans. Cybern. (2015)
Keyphrases
- sparse representation
- discrete cosine transform
- dictionary learning
- sparse coding
- reconstruction error
- face recognition
- compressive sensing
- image classification
- transform domain
- compressed sensing
- signal processing
- image patches
- image compression
- sparse reconstruction
- negative matrix factorization
- dimensionality reduction
- random projections
- spatial domain
- joint optimization
- computer vision
- test images
- image representation
- high dimensional data
- higher order
- pattern recognition
- regularized least squares
- sparsity constraints
- sparse learning
- data sets
- sparse approximations