Spatio-temporal regularized shock-diffusion filtering with local entropy for restoration of degraded document images.
Yan WangLingxin ZhouXuyuan ZhangPublished in: Appl. Math. Comput. (2023)
Keyphrases
- document images
- diffusion filtering
- noise removal
- restored image
- ocr systems
- image restoration
- degraded images
- noisy images
- document image analysis
- denoising
- scanned documents
- document analysis
- image processing
- gaussian noise
- image enhancement
- optical character recognition
- anisotropic diffusion
- motion blur
- regularization parameter
- edge detection
- moving objects
- image sequences
- page segmentation
- image quality
- noise reduction
- printed documents
- computer vision
- historical documents
- impulse noise
- image denoising
- edge preserving
- total variation
- handwritten documents
- feature vectors
- video sequences
- wavelet shrinkage