Hierarchical Dictionary Learning and Sparse Coding for Static Signature Verification.
Elias N. ZoisMarianna PapagiannopoulouDimitrios TsourounisGeorge EconomouPublished in: CVPR Workshops (2018)
Keyphrases
- dictionary learning
- signature verification
- sparse coding
- sparse representation
- unsupervised learning
- image classification
- natural images
- linear combination
- discriminative dictionary
- discriminative power
- group sparsity
- generative model
- sparse codes
- single image super resolution
- image representation
- object category recognition
- visual words
- dynamic time warping
- feature space
- image patches
- high dimensional
- sparsity constraints
- bag of words
- learning algorithm
- em algorithm
- image features
- computer vision