Keyphrases
- prior knowledge
- machine learning
- feature extraction
- learning models
- learning process
- active learning
- learning problems
- learning systems
- feature hierarchies
- data sets
- feature construction
- learning tasks
- background knowledge
- image classification
- feature set
- learning algorithm
- online learning
- training examples
- co occurrence
- supervised learning
- image features
- feature vectors
- positive examples
- training data
- sample selection bias