Quaternion-based sparse representation of color image.
Licheng YuYi XuHongteng XuHao ZhangPublished in: ICME (2013)
Keyphrases
- sparse representation
- color images
- color texture
- dictionary learning
- sparse coding
- fourier transform
- color space
- face recognition
- image classification
- image processing
- color information
- signal processing
- image representation
- random projections
- negative matrix factorization
- compressed sensing
- compressive sensing
- regularized least squares
- object tracking
- high dimensional data
- image patches
- natural images
- joint optimization
- reconstruction error
- dimensionality reduction
- sparse approximations
- test images
- texture images
- sparse reconstruction
- piecewise smooth
- face images
- norm minimization
- neural network
- machine learning
- sparsity constraints
- sparse coefficients