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Digital Objez Ide tifie (DOI) 10.1007/s10032-003-0113-0 IJDAR (2003) 6:126--144 Lexicon-dr en HMM decodingfor lar vocabular handwr- randwrwith multiple char
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In: http://www.ppgia.pucpr.br/~alekoe/pt/./Papers/Koerich-IJDAR2003.pdf (2003)
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Abstract:
This paper present ahandwrit30 recognitec systg tt dealswit unconst2S)8S handwrit ing and large vocabularies. Thesyst5 is based on t) segmentmen)2S20)8S2[[--) paradigm where words arefirst loosely segmentm int charact)8 or pseudocharact)8 and td final segmentgmen isobt[5SO duringtr recognitog process, which is carriedout wit a lexicon. Charactr - are modeled by multO0] hidden Markov models (HMMs), which areconcat5)8S-- t build up word models. The lexicon is organized as at3] st[]O)8S0 and duringtr decoding words wit similar prefixes share th same stput To avoid an explosion of tf search space duet te presence of multS20 charact - models, a lexicon-driven level building algorit) (LDLBA)is usedt decode t) lexicaltxi andt choose at each levelt] more likely models. Bigram probabilitpr relata t ta variat5) ofwrit#[ st yleswit)-- tt words areinsert[ bet ween tn levels of t) LDLBAt improvet2 recognit52 accuracy. TofurtS[ speed up tp recognit8-- process, someconst2S[ t are addedt limit tm searche#ort t to more likelypart of t) search space. Experimenti result on adat[#2 of 4674 unconst#[)83 words showt3# t3 proposed recognit)8 systo achieves recognit3# rato from 98% for a 10word vocabularyt 71% for a 30,000-word vocabulary and recognit3S tcog from 9 mst o 18.4 s, resp ect) ely.
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Keyword:
Handwriting recognition – Large vocabulary – Level building algorithm – Hidden Markov models – Searc
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URL: http://www.ppgia.pucpr.br/~alekoe/pt/./Papers/Koerich-IJDAR2003.pdf
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.61.6356
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Lexicon-Driven HMM Decoding for Large Vocabulary Handwriting Recognition with Multiple Character Models
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In: http://www.ppgia.pucpr.br/~alekoe/Port/./Papers/Koerich_IJDAR_2003.pdf (2003)
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Lexicon-Driven HMM Decoding for Large Vocabulary Handwriting Recognition with Multiple Character Models
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In: http://www.livia.etsmtl.ca/publications/2003/ijdar_Koerich2003.pdf (2003)
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