Noise Level Estimation for Overcomplete Dictionary Learning Based on Tight Asymptotic Bounds.
Rui ChenChangshui YangHuizhu JiaXiaodong XiePublished in: CoRR (2017)
Keyphrases
- dictionary learning
- noise level
- sparse representation
- sparse coding
- worst case
- upper bound
- lower bound
- noisy images
- natural images
- noise estimation
- noise reduction
- image classification
- hyperparameters
- image patches
- denoising
- signal processing
- linear combination
- generative model
- error rate
- image representation
- face recognition
- image denoising
- object recognition
- test images
- unsupervised learning
- high dimensional data
- dimensionality reduction
- input image
- probabilistic model
- feature space
- high quality
- data sets