High Resolution Time-Frequency Distribution Based on Short-Time Sparse Representation.
Zhen LiuPeng YouXizhang WeiDongping LiaoXiang LiPublished in: Circuits Syst. Signal Process. (2014)
Keyphrases
- sparse representation
- high resolution
- signal processing
- dictionary learning
- sparse coding
- image super resolution
- single image super resolution
- low resolution
- compressed sensing
- face recognition
- image classification
- random projections
- high dimensional data
- joint optimization
- compressive sensing
- image patches
- reconstruction error
- dimensionality reduction
- negative matrix factorization
- piecewise smooth
- high quality
- test images
- image processing
- image representation
- neural network
- sparse reconstruction
- sparse approximations
- regularized least squares
- frequency domain
- fourier transform
- super resolution
- face images
- object detection
- small number
- pattern recognition
- feature extraction
- computer vision
- machine learning