Keyphrases
- sparse representation
- image representation
- image features
- image classification
- object recognition
- test images
- reconstruction error
- multiscale
- dictionary learning
- sparse coding
- image data
- single image
- sparse coefficients
- piecewise smooth
- image segmentation
- sparse reconstruction
- image retrieval
- compressed sensing
- compressive sensing
- joint optimization
- scene classification
- image matching
- input image
- basis vectors
- computer vision
- visual words
- image patches
- high resolution
- feature matching
- feature vectors
- random projections
- image regions
- linear combination
- signal processing
- keypoints
- object categories
- object tracking
- spatial information
- probabilistic model
- feature space
- similarity measure
- feature extraction
- face recognition
- decision trees