Fusing High- and Low-Level Features for Handwritten Word Recognition

Alessandro L. Koerich 1 Alceu S. Britto Jr. 1 Luiz E. S. De Oliveira 1 Robert Sabourin 2
1 PUCPR - Pontifical Catholic University of Paraná
2 ETS - Ecole de Technologie Supérieure [Montréal]
Abstract : This paper presents a novel approach that combines high level and low level features for the recognition of handwritten words. Given a word image, high level features are extracted from loosely segmented words. Such features are used with an HMM word classifier in a lexicon-driven approach. This classifier produces at the output a ranked list of the N-best recognition hypotheses consisting of text transcripts, segmentation boundaries of the word hypotheses into characters, and recognition scores. Given the segmentation boundaries produced by the HMM classifier, low level features are extracted from the character hypotheses. Such features are used with a segmental neural network classifier (SNN) in a hypothesis-driven approach. At combination level, the confidence scores produced by both HMM and SNN classifier are combined through simple combination rules. Experimental results on a large database have shown that the combination of high-level and low-level features reduces the word error rate in almost 71%.
Keywords : Feature extraction Combination Word recognition
Type de document :
Communication dans un congrès
Guy Lorette. Tenth International Workshop on Frontiers in Handwriting Recognition, Oct 2006, La Baule (France), Suvisoft, 2006
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Alessandro L. Koerich, Alceu S. Britto Jr., Luiz E. S. De Oliveira, Robert Sabourin. Fusing High- and Low-Level Features for Handwritten Word Recognition. Guy Lorette. Tenth International Workshop on Frontiers in Handwriting Recognition, Oct 2006, La Baule (France), Suvisoft, 2006. 〈inria-00104852〉

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