Names, Right or Wrong: Named Entities in an OCRed Historical Finnish Newspaper

Kimmo Tapio Kettunen, Teemu Petteri Ruokolainen

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

Named Entity Recognition (NER), search, classification and tagging of names and name like frequent informational elements in texts, has become a standard information extraction procedure for textual data. NER has been applied to many types of texts and different types of entities: newspapers, fiction, historical records, persons, locations, chemical compounds, protein families, animals etc. In general a NER system’s performance is genre and domain dependent and also used entity categories vary [16]. The most general set of named entities is usually some version of three partite categorization of locations, persons and organizations. In this paper we report evaluation result of NER with data out of a digitized Finnish historical newspaper collection Digi. Experiments, results and discussion of this research serve development of the Web collection of historical Finnish newspapers

Digi collection contains 1,960,921 pages of newspaper material from years 1771–1910 both in Finnish and Swedish. We use only material of Finnish documents in our evaluation. The OCRed newspaper collection has lots of OCR errors; its estimated word level correctness is about 70–75% [7]. Our baseline NER tagger is a rule-based tagger of Finnish, FiNER, provided by the FIN-CLARIN consortium. Three other available tools are also evaluated: a Finnish Semantic Tagger (FST), Connexor’s NER tool and Polyglot’s NER.
Original languageEnglish
Title of host publicationProceedings of the 2nd International Conference on Digital Access to Textual Cultural Heritage
Number of pages6
Place of PublicationNew York
PublisherACM
Publication date1 Jun 2017
Pages181-186
ISBN (Electronic)978-1-4503-5265-9
DOIs
Publication statusPublished - 1 Jun 2017
MoE publication typeA4 Article in conference proceedings
EventDaTeCH 2017 - Göttingen, Germany
Duration: 1 Jun 20172 Jun 2017

Fields of Science

  • 113 Computer and information sciences

Cite this

Kettunen, K. T., & Ruokolainen, T. P. (2017). Names, Right or Wrong: Named Entities in an OCRed Historical Finnish Newspaper. In Proceedings of the 2nd International Conference on Digital Access to Textual Cultural Heritage (pp. 181-186). New York: ACM. https://doi.org/10.1145/3078081.3078084
Kettunen, Kimmo Tapio ; Ruokolainen, Teemu Petteri. / Names, Right or Wrong : Named Entities in an OCRed Historical Finnish Newspaper. Proceedings of the 2nd International Conference on Digital Access to Textual Cultural Heritage. New York : ACM, 2017. pp. 181-186
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abstract = "Named Entity Recognition (NER), search, classification and tagging of names and name like frequent informational elements in texts, has become a standard information extraction procedure for textual data. NER has been applied to many types of texts and different types of entities: newspapers, fiction, historical records, persons, locations, chemical compounds, protein families, animals etc. In general a NER system’s performance is genre and domain dependent and also used entity categories vary [16]. The most general set of named entities is usually some version of three partite categorization of locations, persons and organizations. In this paper we report evaluation result of NER with data out of a digitized Finnish historical newspaper collection Digi. Experiments, results and discussion of this research serve development of the Web collection of historical Finnish newspapersDigi collection contains 1,960,921 pages of newspaper material from years 1771–1910 both in Finnish and Swedish. We use only material of Finnish documents in our evaluation. The OCRed newspaper collection has lots of OCR errors; its estimated word level correctness is about 70–75{\%} [7]. Our baseline NER tagger is a rule-based tagger of Finnish, FiNER, provided by the FIN-CLARIN consortium. Three other available tools are also evaluated: a Finnish Semantic Tagger (FST), Connexor’s NER tool and Polyglot’s NER.",
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Kettunen, KT & Ruokolainen, TP 2017, Names, Right or Wrong: Named Entities in an OCRed Historical Finnish Newspaper. in Proceedings of the 2nd International Conference on Digital Access to Textual Cultural Heritage. ACM, New York, pp. 181-186, Göttingen, Germany, 01/06/2017. https://doi.org/10.1145/3078081.3078084

Names, Right or Wrong : Named Entities in an OCRed Historical Finnish Newspaper. / Kettunen, Kimmo Tapio; Ruokolainen, Teemu Petteri.

Proceedings of the 2nd International Conference on Digital Access to Textual Cultural Heritage. New York : ACM, 2017. p. 181-186.

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

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AB - Named Entity Recognition (NER), search, classification and tagging of names and name like frequent informational elements in texts, has become a standard information extraction procedure for textual data. NER has been applied to many types of texts and different types of entities: newspapers, fiction, historical records, persons, locations, chemical compounds, protein families, animals etc. In general a NER system’s performance is genre and domain dependent and also used entity categories vary [16]. The most general set of named entities is usually some version of three partite categorization of locations, persons and organizations. In this paper we report evaluation result of NER with data out of a digitized Finnish historical newspaper collection Digi. Experiments, results and discussion of this research serve development of the Web collection of historical Finnish newspapersDigi collection contains 1,960,921 pages of newspaper material from years 1771–1910 both in Finnish and Swedish. We use only material of Finnish documents in our evaluation. The OCRed newspaper collection has lots of OCR errors; its estimated word level correctness is about 70–75% [7]. Our baseline NER tagger is a rule-based tagger of Finnish, FiNER, provided by the FIN-CLARIN consortium. Three other available tools are also evaluated: a Finnish Semantic Tagger (FST), Connexor’s NER tool and Polyglot’s NER.

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Kettunen KT, Ruokolainen TP. Names, Right or Wrong: Named Entities in an OCRed Historical Finnish Newspaper. In Proceedings of the 2nd International Conference on Digital Access to Textual Cultural Heritage. New York: ACM. 2017. p. 181-186 https://doi.org/10.1145/3078081.3078084