Machine reading of camera-held low quality text images: An ICA-based image enhancement approach for improving OCR accuracy.
Utpal GarainAtishay JainAnjan MaityBhabatosh ChandaPublished in: ICPR (2008)
Keyphrases
- image enhancement
- low quality
- gamma correction
- image analysis
- contrast enhancement
- edge detection
- color image enhancement
- high quality
- fingerprint images
- image contrast enhancement
- histogram equalization
- image processing
- enhanced image
- homomorphic filtering
- ccd camera
- transfer function
- input image
- color restoration
- poor quality
- minutiae extraction
- feature extraction
- region of interest
- optical character recognition
- lighting conditions
- gray scale
- low quality images
- dynamic range compression
- computer vision
- computational complexity
- multiresolution
- image contrast
- fingerprint recognition
- denoising
- imaging devices
- text lines