Abhijit Mitra, Restoration of Noisy Document Images with an Efficient Bi-Level Adaptive Thresholding. journal = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology. June 2008, vol. 18(6). 2226 - 2231 [viewed 19 September 2024]. Available from: https://publications.waset.org/pdf/15663.