Keyphrases
- image enhancement
- image processing
- image analysis
- digital image processing
- causal reasoning
- numerical analysis
- edge detection
- image processing and analysis
- median filter
- contrast enhancement
- unsharp masking
- color image enhancement
- histogram equalization
- human faces
- image contrast enhancement
- partial differential equations
- face images
- facial images
- transfer function
- minutiae extraction
- shock filter
- multiscale
- lighting conditions
- facial expressions