An illumination-independent edge detection and fuzzy enhancement algorithm based on wavelet transform for non-uniform weak illumination images.
Wanpeng CaoRensheng CheDong YePublished in: Pattern Recognit. Lett. (2008)
Keyphrases
- edge detection
- retinex theory
- edge detection algorithm
- transformed images
- imaging conditions
- color constancy
- lighting conditions
- wavelet transform
- haar wavelet
- image enhancement
- varying illumination
- color restoration
- test images
- input image
- edge detection algorithms
- illumination conditions
- enhanced image
- illumination correction
- segmentation algorithm
- homomorphic filtering
- noisy images
- viewing angle
- multiscale
- image matching
- directional filtering
- gradient information
- geometric and photometric transformations
- image set
- image registration
- probe image
- matching algorithm
- colour constancy
- human faces
- intensity gradient
- illumination change