The Statistical Inefficiency of Sparse Coding for Images (or, One Gabor to Rule them All)
James BergstraAaron C. CourvilleYoshua BengioPublished in: CoRR (2011)
Keyphrases
- sparse coding
- image classification
- image representation
- sparse representation
- natural image statistics
- image data
- dictionary learning
- object category recognition
- input image
- object recognition
- natural images
- test images
- image features
- gabor filters
- ground truth
- feature space
- linear combination
- image regions
- basis vectors
- unsupervised learning
- small number
- image annotation
- multiscale
- similarity measure
- data sets
- dimensionality reduction
- visual words
- feature vectors
- reinforcement learning
- discriminative power
- spatial pyramid matching
- computer vision