[1] [1] Eskenazi, Sébastien, P. Gomez-Kr mer and J. M. Ogier, Pattern Recognition 64, 1 (2017).

[2] [2] Dai-Ton Ha, N. Duc-Dung and D. H. Le, Pattern Recognition Letters 80, 137 (2016).

[3] [3] Ming Yu, Computer Engineering and Applications 49, 195 (2013). (in Chinese)

[4] [4] Rong Xiao, South-Center University for Nationalities, 2011. (in Chinese)

[5] [5] Bukhari and Syed Saqib, 2012 International Conference on Frontiers in Handwriting Recognition, 639 (2012).

[6] [6] Kavitha A. S., Egyptian Informatics Journal 17, 189 (2016).

[7] [7] Zeng Fanfeng, Journal of Software 8, 1827 (2013).

[8] [8] Yadav, Vikas and N. Ragot, 2016 12th Iapr International Workshop on Document Analysis Systems, 281 (2016).

[9] [9] Ramel J. Y., International Journal on Document Analysis and Recognition 9, 243 (2007).

[10] [10] Winder, Amy, T. Andersen and E. H. B. Smith, 2011 International Conference on Document Analysis and Recognition IEEE Computer Society, 1245 (2011).

[11] [11] Singh V and B. Kumar, 2014 International Conference on Computer Communication and Informatics IEEE, 1 (2014).

[12] [12] Chen Kai, 2015 13th International Conference on Document Analysis and Recognition, 1101 (2015).

[13] [13] Chen Kai, 2016 12th Iapr Workshop on Document Analysis Systems IEEE Computer Society, 299 (2016).