Devanagari OCR using a recognition driven segmentation framework and stochastic language models
Identifieur interne : 000194 ( PascalFrancis/Corpus ); précédent : 000193; suivant : 000195Devanagari OCR using a recognition driven segmentation framework and stochastic language models
Auteurs : Suryaprakash Kompalli ; Srirangaraj Setlur ; Venu GovindarajuSource :
- International journal on document analysis and recognition : (Print) [ 1433-2833 ] ; 2009.
Descripteurs français
- Pascal (Inist)
- Reconnaissance caractère, Reconnaissance optique caractère, Concordance forme, Classification, Mot, Langage naturel, Automate stochastique, Automate fini, Machine état fini, Linguistique, Reconnaissance forme, Traitement image, Segmentation, Approche probabiliste, Modélisation, Méthode graphe, Théorie graphe, ., Appariement image, Modèle n gramme.
English descriptors
- KwdEn :
- Character recognition, Classification, Finite automaton, Finite state machine, Graph method, Graph theory, Image matching, Image processing, Linguistics, Modeling, N gram model, Natural language, Optical character recognition, Pattern matching, Pattern recognition, Probabilistic approach, Segmentation, Stochastic automaton, Word.
Abstract
This paper describes a novel recognition driven segmentation methodology for Devanagari Optical Character Recognition. Prior approaches have used sequential rules to segment characters followed by template matching for classification. Our method uses a graph representation to segment characters. This method allows us to segment horizontally or vertically overlapping characters as well as those connected along non-linear boundaries into finer primitive components. The components are then processed by a classifier and the classifier score is used to determine if the components need to be further segmented. Multiple hypotheses are obtained for each composite character by considering all possible combinations of the classifier results for the primitive components. Word recognition is performed by designing a stochastic finite state automaton (SFSA) that takes into account both classifier scores as well as character frequencies. A novel feature of our approach is that we use sub-character primitive components in the classification stage in order to reduce the number of classes whereas we use an n-gram language model based on the linguistic character units for word recognition.
Notice en format standard (ISO 2709)
Pour connaître la documentation sur le format Inist Standard.
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Format Inist (serveur)
NO : | PASCAL 10-0180818 INIST |
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ET : | Devanagari OCR using a recognition driven segmentation framework and stochastic language models |
AU : | KOMPALLI (Suryaprakash); SETLUR (Srirangaraj); GOVINDARAJU (Venu) |
AF : | Department of Computer Science and Engineering, University at Buffalo, State University of New York/Buffalo/Etats-Unis (1 aut., 2 aut., 3 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | International journal on document analysis and recognition : (Print); ISSN 1433-2833; Allemagne; Da. 2009; Vol. 12; No. 2; Pp. 123-138; Bibl. 47 ref. |
LA : | Anglais |
EA : | This paper describes a novel recognition driven segmentation methodology for Devanagari Optical Character Recognition. Prior approaches have used sequential rules to segment characters followed by template matching for classification. Our method uses a graph representation to segment characters. This method allows us to segment horizontally or vertically overlapping characters as well as those connected along non-linear boundaries into finer primitive components. The components are then processed by a classifier and the classifier score is used to determine if the components need to be further segmented. Multiple hypotheses are obtained for each composite character by considering all possible combinations of the classifier results for the primitive components. Word recognition is performed by designing a stochastic finite state automaton (SFSA) that takes into account both classifier scores as well as character frequencies. A novel feature of our approach is that we use sub-character primitive components in the classification stage in order to reduce the number of classes whereas we use an n-gram language model based on the linguistic character units for word recognition. |
CC : | 001D02C03 |
FD : | Reconnaissance caractère; Reconnaissance optique caractère; Concordance forme; Classification; Mot; Langage naturel; Automate stochastique; Automate fini; Machine état fini; Linguistique; Reconnaissance forme; Traitement image; Segmentation; Approche probabiliste; Modélisation; Méthode graphe; Théorie graphe; .; Appariement image; Modèle n gramme |
ED : | Character recognition; Optical character recognition; Pattern matching; Classification; Word; Natural language; Stochastic automaton; Finite automaton; Finite state machine; Linguistics; Pattern recognition; Image processing; Segmentation; Probabilistic approach; Modeling; Graph method; Graph theory; Image matching; N gram model |
SD : | Reconocimiento carácter; Reconocimento óptico de caracteres; Clasificación; Palabra; Lenguaje natural; Autómata estocástico; Autómata estado finito; Máquina estado finito; Linguística; Reconocimiento patrón; Procesamiento imagen; Segmentación; Enfoque probabilista; Modelización; Método grafo; Teoría grafo; reconocimiento de patrones en imágenes; Modelo n grama |
LO : | INIST-26790.354000170255530050 |
ID : | 10-0180818 |
Links to Exploration step
Pascal:10-0180818Le document en format XML
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<ET>Devanagari OCR using a recognition driven segmentation framework and stochastic language models</ET>
<AU>KOMPALLI (Suryaprakash); SETLUR (Srirangaraj); GOVINDARAJU (Venu)</AU>
<AF>Department of Computer Science and Engineering, University at Buffalo, State University of New York/Buffalo/Etats-Unis (1 aut., 2 aut., 3 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
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<EA>This paper describes a novel recognition driven segmentation methodology for Devanagari Optical Character Recognition. Prior approaches have used sequential rules to segment characters followed by template matching for classification. Our method uses a graph representation to segment characters. This method allows us to segment horizontally or vertically overlapping characters as well as those connected along non-linear boundaries into finer primitive components. The components are then processed by a classifier and the classifier score is used to determine if the components need to be further segmented. Multiple hypotheses are obtained for each composite character by considering all possible combinations of the classifier results for the primitive components. Word recognition is performed by designing a stochastic finite state automaton (SFSA) that takes into account both classifier scores as well as character frequencies. A novel feature of our approach is that we use sub-character primitive components in the classification stage in order to reduce the number of classes whereas we use an n-gram language model based on the linguistic character units for word recognition.</EA>
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<ED>Character recognition; Optical character recognition; Pattern matching; Classification; Word; Natural language; Stochastic automaton; Finite automaton; Finite state machine; Linguistics; Pattern recognition; Image processing; Segmentation; Probabilistic approach; Modeling; Graph method; Graph theory; Image matching; N gram model</ED>
<SD>Reconocimiento carácter; Reconocimento óptico de caracteres; Clasificación; Palabra; Lenguaje natural; Autómata estocástico; Autómata estado finito; Máquina estado finito; Linguística; Reconocimiento patrón; Procesamiento imagen; Segmentación; Enfoque probabilista; Modelización; Método grafo; Teoría grafo; reconocimiento de patrones en imágenes; Modelo n grama</SD>
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