Hierarchical and Spatio-Temporal Sparse Representation for Human Action Recognition.
Yi TianYu KongQiuqi RuanGaoyun AnYun FuPublished in: IEEE Trans. Image Process. (2018)
Keyphrases
- sparse representation
- spatio temporal
- dictionary learning
- sparse coding
- human actions
- image classification
- compressed sensing
- face recognition
- dimensionality reduction
- negative matrix factorization
- reconstruction error
- sparse approximations
- joint optimization
- object tracking
- compressive sensing
- image patches
- random projections
- signal processing
- regularized least squares
- sparse reconstruction
- image sequences
- test images
- high dimensional data
- action recognition
- unsupervised learning
- piecewise smooth
- decision trees
- linear combination
- image representation
- data points
- image retrieval