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	Author	Volkmar Frinken; Andreas Fischer; Carlos David Martinez Hinarejos
	Title	Handwriting Recognition in Historical Documents using Very Large Vocabularies			Type	Conference Article
	Year	2013	Publication	2nd International Workshop on Historical Document Imaging and Processing	Abbreviated Journal
	Volume		Issue		Pages	67-72
	Keywords
	Abstract	Language models are used in automatic transcription system to resolve ambiguities. This is done by limiting the vocabulary of words that can be recognized as well as estimating the n-gram probability of the words in the given text. In the context of historical documents, a non-unified spelling and the limited amount of written text pose a substantial problem for the selection of the recognizable vocabulary as well as the computation of the word probabilities. In this paper we propose for the transcription of historical Spanish text to keep the corpus for the n-gram limited to a sample of the target text, but expand the vocabulary with words gathered from external resources. We analyze the performance of such a transcription system with different sizes of external vocabularies and demonstrate the applicability and the significant increase in recognition accuracy of using up to 300 thousand external words.
	Address	Washington; USA; August 2013
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN	978-1-4503-2115-0	Medium
	Area		Expedition		Conference	HIP
	Notes	DAG; 600.056; 600.045; 600.061; 602.006; 602.101			Approved	no
	Call Number	Admin @ si @ FFM2013			Serial	2296
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