Dynamic dictionary optimization for sparse-representation-based face classification using local difference images.
Chang-Bin ShaoXiaoning SongZhen-Hua FengXiaojun WuYuhui ZhengPublished in: Inf. Sci. (2017)
Keyphrases
- image classification
- sparse representation
- classification algorithm
- object category recognition
- input image
- image data
- human recognition
- three dimensional
- dictionary learning
- pattern recognition
- gender recognition
- image analysis
- test images
- lighting conditions
- text classification
- image database
- image registration
- image features
- object recognition
- image collections
- support vector machine
- feature extraction
- illumination conditions
- extracted features
- complex background
- feature selection
- segmentation algorithm
- decision trees
- feature points
- medical images
- classification accuracy
- image retrieval
- image regions
- image set
- feature space
- gabor filters
- face images
- data points
- skin lesion
- preprocessing stage
- feature vectors