Image Enhancement of Historical Documents Using Directional Wavelet.
Qian WangLida LiChew Lim TanTao XiaPublished in: Int. J. Wavelets Multiresolution Inf. Process. (2003)
Keyphrases
- image enhancement
- historical documents
- handwriting recognition
- image processing
- document images
- word recognition
- image analysis
- edge detection
- wavelet transform
- denoising
- median filter
- histogram equalization
- multiscale
- color image enhancement
- image contrast enhancement
- contrast enhancement
- multiresolution
- wavelet coefficients
- pattern recognition
- transfer function
- homomorphic filtering
- image preprocessing
- handwritten documents
- noisy images
- speech recognition
- machine learning