Dictionary learning based on M-PCA-N for audio signal sparse representation.
Ji-Chen YangQianhua HeYanxiong LiLei-an LiuJianhong LiXiaohui FengPublished in: IET Signal Process. (2018)
Keyphrases
- dictionary learning
- sparse representation
- audio signal
- face recognition
- principal component analysis
- dimensionality reduction
- negative matrix factorization
- sparse coding
- random projections
- image classification
- face images
- high dimensional data
- image patches
- signal processing
- group sparsity
- compressive sensing
- feature extraction
- sparse codes
- sparsity constraints
- low dimensional
- image representation
- test images
- frequency domain
- feature space
- computer vision
- data mining
- data sets
- image data
- data points
- training data