Sparsity-based inverse halftoning via semi-coupled multi-dictionary learning and structural clustering.
Yan ZhangErhu ZhangWanjun ChenYajun ChenJinghong DuanPublished in: Eng. Appl. Artif. Intell. (2018)
Keyphrases
- dictionary learning
- sparse representation
- inverse halftoning
- sparse coding
- sparsity constraints
- high dimensional data
- gray scale
- unsupervised learning
- clustering algorithm
- image quality
- image classification
- k means
- face recognition
- image patches
- negative matrix factorization
- halftone images
- test images
- signal processing
- data points
- low dimensional