Combining Trigram and Winnow in Thai OCR Error Correction Surapant Meknavin author Boonserm Kijsirikul author Ananlada Chotimongkol author Cholwich Nuttee author 1998 text COLING 1998 Volume 2: The 17th International Conference on Computational Linguistics conference publication meknavin-etal-1998-combining https://aclanthology.org/C98-2133/ 1998