Video-based facial expression recognition using learned spatiotemporal pyramid sparse coding features.
Fei LongMarian Stewart BartlettPublished in: Neurocomputing (2016)
Keyphrases
- sparse coding
- spatial pyramid matching
- feature space
- dictionary learning
- image representation
- natural images
- sparse representation
- image classification
- generative model
- feature extraction
- linear combination
- unsupervised learning
- multiscale
- co occurrence
- basis vectors
- feature vectors
- sparse codes
- scale space
- bag of words
- test images
- input image
- metric learning
- linear classifiers
- data points
- discriminative power
- person re identification