Decision fusion of horizontal and vertical trajectories for recognition of online Farsi subwords

Online handwriting is formed by a combination of horizontal and vertical trajectories. If these trajectories are treated separately, new recognition methods are emerged. In contrast, one classifier is often used to recognize handwriting. In this work, some features for x(t) and y(t) signals were proposed and used to make two separate classifiers. After initial recognition by these classifiers, their results were fused for final recognition. Using HMM classifiers and simple product rule for decision fusion, the recognition results of 42 classes of Farsi subwords showed promising achievements.

[1]  Marcus Liwicki,et al.  Feature Selection for HMM and BLSTM Based Handwriting Recognition of Whiteboard Notes , 2009, Int. J. Pattern Recognit. Artif. Intell..

[2]  Josep Lladós,et al.  Unsupervised writer adaptation of whole-word HMMs with application to word-spotting , 2010, Pattern Recognit. Lett..

[3]  Ehsanollah Kabir,et al.  A blackboard approach towards integrated Farsi OCR system , 2009, International Journal of Document Analysis and Recognition (IJDAR).

[4]  Subhash C. Bagui,et al.  Combining Pattern Classifiers: Methods and Algorithms , 2005, Technometrics.

[5]  Masaki Nakagawa,et al.  'Online recognition of Chinese characters: the state-of-the-art , 2004, IEEE Transactions on Pattern Analysis and Machine Intelligence.

[6]  Karim Faez,et al.  Handwritten Farsi (Arabic) word recognition: a holistic approach using discrete HMM , 2001, Pattern Recognit..

[7]  Hany Ahmed,et al.  On-line Arabic Handwriting Recognition System Based on HMM , 2011, 2011 International Conference on Document Analysis and Recognition.

[8]  Lawrence R. Rabiner,et al.  A tutorial on hidden Markov models and selected applications in speech recognition , 1989, Proc. IEEE.

[9]  Gernot A. Fink,et al.  Markov models for offline handwriting recognition: a survey , 2009, International Journal on Document Analysis and Recognition (IJDAR).

[10]  Sargur N. Srihari,et al.  On-Line and Off-Line Handwriting Recognition: A Comprehensive Survey , 2000, IEEE Trans. Pattern Anal. Mach. Intell..

[11]  Marcus Liwicki,et al.  HMM-Based On-Line Recognition of Handwritten Whiteboard Notes , 2006 .

[12]  Volker Märgner,et al.  On-line Arabic handwriting recognition competition , 2010, International Journal on Document Analysis and Recognition (IJDAR).

[13]  Ludmila I. Kuncheva,et al.  Combining Pattern Classifiers: Methods and Algorithms , 2004 .

[14]  Saeed Bagheri Shouraki,et al.  Recognition of Persian Online Handwriting Using Elastic Fuzzy Pattern Recognition , 2007, Int. J. Pattern Recognit. Artif. Intell..

[15]  Saeed Bagheri Shouraki,et al.  A novel fuzzy approach to recognition of online Persian handwriting , 2005, 5th International Conference on Intelligent Systems Design and Applications (ISDA'05).

[16]  Adel M. Alimi,et al.  On-line Arabic handwriting recognition system based on visual encoding and genetic algorithm , 2009, Eng. Appl. Artif. Intell..

[17]  Fadi Biadsy,et al.  Segmentation-Free Online Arabic Handwriting Recognition , 2011, Int. J. Pattern Recognit. Artif. Intell..

[18]  Paul D. Gader,et al.  Fusion of multiple handwritten word recognition techniques , 2001, Pattern Recognit. Lett..

[19]  Jonas Andersson,et al.  On-line Arabic handwriting recognition with templates , 2009, Pattern Recognit..

[20]  Thierry Denoeux,et al.  Decision fusion for postal address recognition using belief functions , 2009, Expert Syst. Appl..

[21]  Ehsanollah Kabir,et al.  Feature Extraction for Online Farsi Characters , 2010, 2010 12th International Conference on Frontiers in Handwriting Recognition.

[22]  Masaki Nakagawa,et al.  The state of the art in Japanese online handwriting recognition compared to techniques in western handwriting recognition , 2003, Document Analysis and Recognition.

[23]  Anil K. Jain,et al.  Online handwritten script recognition , 2004 .

[24]  Off-line recognition of handwritten middle age Persian characters using moment , 2006, Pattern Recognition and Image Analysis.

[25]  Jianmin Jiang,et al.  Offline handwritten Arabic cursive text recognition using Hidden Markov Models and re-ranking , 2011, Pattern Recognit. Lett..

[26]  Sargur N. Srihari,et al.  Decision Combination in Multiple Classifier Systems , 1994, IEEE Trans. Pattern Anal. Mach. Intell..

[27]  Venu Govindaraju,et al.  Offline Arabic handwriting recognition: a survey , 2006, IEEE Transactions on Pattern Analysis and Machine Intelligence.

[28]  Ling Guan,et al.  Velocity and pressure-based partitions of horizontal and vertical trajectories for on-line signature verification , 2010, Pattern Recognit..

[29]  Josef Kittler,et al.  Modified product fusion , 2002, Pattern Recognit. Lett..

[30]  Alexander H. Waibel,et al.  Online handwriting recognition: the NPen++ recognizer , 2001, International Journal on Document Analysis and Recognition.