Keyphrases
- compressive sensing
- sparse coding
- image representation
- sparse representation
- learned dictionary
- image classification
- compressive sampling
- single image super resolution
- group sparsity
- dictionary learning
- multiscale
- natural images
- image features
- image data
- test images
- random projections
- input image
- image segmentation
- high resolution
- unsupervised learning
- bag of words
- discriminative power
- linear combination
- visual words
- signal processing
- image retrieval
- structured sparsity
- high dimensional data
- face recognition
- machine learning
- generative model
- active learning
- pairwise
- feature space
- computer vision