Human mouth-state recognition based on learned discriminative dictionary and sparse representation combined with homotopy.
Jianhua WuJinqiang ZhuQiegen LiuYe ZhangPublished in: Multim. Tools Appl. (2015)
Keyphrases
- sparse representation
- sparse coding
- dictionary learning
- sparse codes
- image classification
- discriminative dictionary
- reconstruction error
- face recognition
- image representation
- unsupervised learning
- natural images
- signal processing
- object recognition
- pattern recognition
- visual categorization
- object tracking
- image patches
- data mining
- feature extraction
- linear combination
- high dimensional data
- supervised learning
- computer vision