Keyphrases
- dictionary learning
- sparse representation
- spectrum sensing
- sparse coding
- cognitive radio networks
- compressive sensing
- cognitive radio
- semi supervised
- feature selection
- feature vectors
- unsupervised learning
- image features
- supervised learning
- image classification
- data sets
- linear combination
- natural images
- wireless communication
- image patches
- principal component analysis
- pairwise
- image processing
- machine learning