An Improved Binarization Method Combined Global Thresholding with Local Thresholding
Han Qi-rui · Computer Technology and Development · 2012
In order to obtain clear accurate binarization image,avoiding the binarization not clear of image subtle information by global thresholding and artifact phenomenon existed in local thresholding,a binarization method combined improved 2d-Otsu best global thresholding with local Bernsen thresholding based on edge information is proposed,detecting edge feature with the aid of Candy operator.The experiments indicate that the method can handle with image with noise and low contrast well,reduce the time complexity of traditional 2d-Otsu by improved 2d-Otsu and block effect of local thresholding,avoid the much false information and keep the detail of the image information.