Noise Level Estimation for Overcomplete Dictionary Learning Based on Tight Asymptotic Bounds.
Rui ChenChangshui YangPublished in: PRCV (3) (2018)
Keyphrases
- dictionary learning
- noise level
- sparse representation
- sparse coding
- worst case
- lower bound
- upper bound
- noisy images
- noise reduction
- noise estimation
- natural images
- face recognition
- image classification
- image patches
- hyperparameters
- linear combination
- generative model
- unsupervised learning
- image representation
- denoising
- high dimensional data
- error rate
- signal processing
- multiscale
- similarity measure
- machine learning
- dimensionality reduction
- edge detection
- higher order
- ground truth
- high dimensional
- feature space
- computational complexity
- pattern recognition
- computer vision