OTSU guided adaptive binarization of CAPTCHA image using gamma correction.
Cunzhao ShiYanna WangBaihua XiaoChunheng WangPublished in: ICPR (2016)
Keyphrases
- gamma correction
- input image
- homomorphic filtering
- image data
- image enhancement
- gray scale images
- multiscale
- image analysis
- image preprocessing
- image segmentation
- hough transform
- single image
- high resolution
- thresholding method
- gray scale
- image processing algorithms
- feature points
- algorithm for image segmentation
- spatial information
- region of interest
- imaging devices
- endoscopic images
- image processing