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Partha Pratim Roy, Umapada Pal, Josep Llados and Mathieu Nicolas Delalandre. 2012. Multi-oriented touching text character segmentation in graphical documents using dynamic programming. PR, 45(5), 1972–1983.
Abstract: 2,292 JCR
The touching character segmentation problem becomes complex when touching strings are multi-oriented. Moreover in graphical documents sometimes characters in a single-touching string have different orientations. Segmentation of such complex touching is more challenging. In this paper, we present a scheme towards the segmentation of English multi-oriented touching strings into individual characters. When two or more characters touch, they generate a big cavity region in the background portion. Based on the convex hull information, at first, we use this background information to find some initial points for segmentation of a touching string into possible primitives (a primitive consists of a single character or part of a character). Next, the primitives are merged to get optimum segmentation. A dynamic programming algorithm is applied for this purpose using the total likelihood of characters as the objective function. A SVM classifier is used to find the likelihood of a character. To consider multi-oriented touching strings the features used in the SVM are invariant to character orientation. Experiments were performed in different databases of real and synthetic touching characters and the results show that the method is efficient in segmenting touching characters of arbitrary orientations and sizes.
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Josep Llados, J. Lopez-Krahe and Enric Marti. 1999. A Hough-based method for hatched pattern detection in maps and diagrams..
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Josep Llados, Felipe Lumbreras and X. Varona. 1999. A multidocument platform for automatic reading of identity cards..
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A. Pujol and 6 others. 1999. Real time pharmaceutical product recognition using color and shape indexing. Proceedings of the 2nd International Workshop on European Scientific and Industrial Collaboration (WESIC´99), Promotoring Advanced Technologies in Manufacturing..
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Josep Llados, Gemma Sanchez and Enric Marti. 1997. A String-Based Method to Recognize Symbols and Structural Textures in Architectural Plans..
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Jordi Vitria and 6 others. 1999. Real time recognition of pharmaceutical products by subspace methods.
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V. Chapaprieta and Ernest Valveny. 2001. Handwritten Digit Recognition Using Point Distribution Models..
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Josep Llados. 1996. Interpretacio de dibuixos linials fets a ma alçada mitjançant isomorfisme entre subgrafs i transformacio de Hough.
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Josep Llados, Felipe Lumbreras, V. Chapaprieta and J. Queralt. 2001. ICAR: Identity Card Automatic Reader..
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Gemma Sanchez and Josep Llados. 2001. A Graph Grammar to Recognize Textured Symbols..
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