Keyphrases
- image enhancement
- retinex theory
- image processing
- human visual system
- image analysis
- edge detection
- image processing and analysis
- contrast enhancement
- histogram equalization
- unsharp masking
- median filter
- partial differential equations
- enhanced image
- image contrast enhancement
- color image enhancement
- pattern recognition
- multiscale
- shock filter
- gamma correction
- signal to noise ratio
- fingerprint images
- transfer function
- minutiae extraction
- machine learning