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Communication Dans Un Congrès Année : 1997

Optical Formula Recognition

Résumé

This paper describes the design and the first steps of implementation of OFR (Optical Formula Recognition), a system for extracting and understanding mathematical expressions in printed documents. Our approach clearly separate OCR step, geometrical treatments and syntactic analysis. In this paper we focus on the third part: we define a class of context-sensitive graph grammars for mathematical formulas, study their properties and show how to remove their ambiguities (by adding contexts in rules) to define efficient parsing. This method is based on a “critical pairs” approach in the sense of Knuth-Bendix algorithm.
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Dates et versions

hal-00564638 , version 1 (09-02-2011)
hal-00564638 , version 2 (27-07-2016)

Licence

Paternité - Pas d'utilisation commerciale - Partage selon les Conditions Initiales

Identifiants

  • HAL Id : hal-00564638 , version 1

Citer

Stéphane Lavirotte, Loïc Pottier. Optical Formula Recognition. 4th International Conference Document Analysis and Recognition, Aug 1997, Ulm, Germany. pp.357-361. ⟨hal-00564638v1⟩
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