1. A survey on document image processing methods useful for assistive technology for the blind;Keefer;Int. J. Image Graph.,2015
2. A review on pixel-based binarization of gray images;Shrivastava,2016
3. A threshold selection method from gray-level histograms;Otsu;IEEE Trans. Syst. Man Cybernet.,1979
4. Modified Otsu thresholding technique;Somasundaram;Math. Modell. Sci. Comput.,2012
5. Text separation in document images through Otsu’s method;Sindhuri,2016