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Mårtensson, Lasse
Publications (10 of 15) Show all publications
Mårtensson, L. & Óskarsson, V. (Eds.). (2018). Scripta Islandica: Isländska sällskapets årsbok 69/2018. Uppsala: Isländska sällskapet
Open this publication in new window or tab >>Scripta Islandica: Isländska sällskapets årsbok 69/2018
2018 (Swedish)Collection (editor) (Refereed)
Place, publisher, year, edition, pages
Uppsala: Isländska sällskapet, 2018. p. 210
Series
Scripta Islandica: Isländska sällskapets årsbok, ISSN 0582-3234, E-ISSN 2001-9416 ; 69
National Category
Humanities and the Arts Specific Languages
Identifiers
urn:nbn:se:uu:diva-371473 (URN)
Available from: 2018-12-29 Created: 2018-12-29 Last updated: 2019-03-13Bibliographically approved
Wahlberg, F., Mårtensson, L. & Brun, A. (2016). Large scale continuous dating of medieval scribes using a combined image and language model. In: : . Paper presented at 12th IAPR International Workshop on Document Analysis Systems (DAS), APR 11-14, 2016, Greece.
Open this publication in new window or tab >>Large scale continuous dating of medieval scribes using a combined image and language model
2016 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Finding the production date of a pre-modern manuscript is commonly a long process in historical research, requiring days of work from highly specialised experts. In this paper, we present an automatic dating method based on modelling both the language and the image data. By creating a statistical model over the changes in the pen strokes and short character sequences in the transcribed text, a combination of multiple estimators give a distribution over the time line for each manuscript. We have evaluated our estimation scheme on the medieval charter collection "Svenskt Diplomatariums huvudkartotek" (SDHK), including more than 5300 transcribed charters from the period 1135 - 1509. Our system is capable of achieving a median absolute error of 12 years, where the only human input is a transcription of the charter text. Since reading and transcribing the text is a skill that many researchers and students have, compared to the more specialized skill of dating medieval manuscripts based on palaeographical expertise, we find our novel approach suitable for helping individual researchers to date collections of manuscript pages. For larger collections, transcriptions could also be collected using crowd sourcing.

National Category
Computer Vision and Robotics (Autonomous Systems)
Research subject
Computerized Image Processing
Identifiers
urn:nbn:se:uu:diva-294882 (URN)10.1109/DAS.2016.71 (DOI)000390411200009 ()
Conference
12th IAPR International Workshop on Document Analysis Systems (DAS), APR 11-14, 2016, Greece
Projects
q2bq2b_vr2012
Funder
Swedish Research Council, 2012-5743
Available from: 2016-05-30 Created: 2016-05-30 Last updated: 2018-05-04Bibliographically approved
Mårtensson, L. & Óskarsson, V. (Eds.). (2015). Scripta Islandica: Isländska sällskapets årsbok 66/2015. Uppsala: Isländska sällskapet
Open this publication in new window or tab >>Scripta Islandica: Isländska sällskapets årsbok 66/2015
2015 (Swedish)Collection (editor) (Refereed)
Place, publisher, year, edition, pages
Uppsala: Isländska sällskapet, 2015. p. 242
Series
Scripta Islandica: Isländska sällskapets årsbok, ISSN 0582-3234, E-ISSN 2001-9416 ; 66
National Category
Humanities
Identifiers
urn:nbn:se:uu:diva-260648 (URN)
Available from: 2015-12-17 Created: 2015-08-21 Last updated: 2018-01-12Bibliographically approved
Óskarsson, V. & Mårtensson, L. (Eds.). (2014). Scripta Islandica: Isländska sällskapets årsbok 64/2013. Uppsala: Isländska sällskapet
Open this publication in new window or tab >>Scripta Islandica: Isländska sällskapets årsbok 64/2013
2014 (Swedish)Collection (editor) (Refereed)
Place, publisher, year, edition, pages
Uppsala: Isländska sällskapet, 2014. p. 160
Series
Scripta Islandica: Isländska sällskapets årsbok, ISSN 0582-3234 ; 64
National Category
Humanities
Research subject
Scandinavian Languages; Literature
Identifiers
urn:nbn:se:uu:diva-201189 (URN)
Available from: 2014-03-05 Created: 2013-06-07 Last updated: 2015-10-29Bibliographically approved
Óskarsson, V., Mårtensson, L., Adams, J., Petrulevich, A. & Williams, H. (Eds.). (2014). Scripta Islandica: Isländska sällskapets årsbok 65/2014. Uppsala: Isländska sällskapet
Open this publication in new window or tab >>Scripta Islandica: Isländska sällskapets årsbok 65/2014
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2014 (Swedish)Collection (editor) (Refereed)
Place, publisher, year, edition, pages
Uppsala: Isländska sällskapet, 2014. p. 238
Series
Scripta Islandica: Isländska sällskapets årsbok, ISSN 0582-3234 ; 65
National Category
Languages and Literature
Research subject
Literature; Scandinavian Languages
Identifiers
urn:nbn:se:uu:diva-235580 (URN)
Funder
Swedish Research Council
Available from: 2014-12-23 Created: 2014-11-06 Last updated: 2015-10-29Bibliographically approved
Wahlberg, F., Dahllöf, M., Mårtensson, L. & Brun, A. (2011). Data Mining Medieval Documents by Word Spotting. In: Proceedings of the 2011 Workshop on Historical Document Imaging and Processing: . Paper presented at Workshop on Historical Document Imaging and Processing, 16-17 Sep 2011, Beijing, China (pp. 75-82). New York: ACM
Open this publication in new window or tab >>Data Mining Medieval Documents by Word Spotting
2011 (English)In: Proceedings of the 2011 Workshop on Historical Document Imaging and Processing, New York: ACM , 2011, p. 75-82Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents novel results for word spotting based on dynamic time warping applied to medieval manuscripts in Latin and Old Swedish. A target word is marked by a user, and the method automatically finds similar word forms in the document by matching them against the target. The method automatically identifies pages and lines. We show that our method improves accuracy compared to earlier proposals for this kind of handwriting. An advantage of the new method is that it performs matching within a text line without presupposing that the difficult problem of segmenting the text line into individual words has been solved. We evaluate our word spotting implementation on two medieval manuscripts representing two script types. We also show that it can be useful by helping a user find words in a manuscript and present graphs of word statistics as a function of page number.

Place, publisher, year, edition, pages
New York: ACM, 2011
National Category
Humanities and the Arts Natural Sciences Language Technology (Computational Linguistics)
Research subject
Computational Linguistics; Computerized Image Processing
Identifiers
urn:nbn:se:uu:diva-162428 (URN)10.1145/2037342.2037355 (DOI)978-1-4503-0916-5 (ISBN)
Conference
Workshop on Historical Document Imaging and Processing, 16-17 Sep 2011, Beijing, China
Available from: 2011-11-30 Created: 2011-11-30 Last updated: 2018-01-12Bibliographically approved
Mårtensson, L. (2010). Översikten över Háttatal i DG 11 4to: dess funktion och ursprung. Gripla, 105-145
Open this publication in new window or tab >>Översikten över Háttatal i DG 11 4to: dess funktion och ursprung
2010 (Swedish)In: Gripla, ISSN 1018-5011, E-ISSN 2351-4264, p. 105-145Article in journal (Other academic) Published
Place, publisher, year, edition, pages
Reykjavik: , 2010
Keywords
DG 11 4to, Edda, Háttatal, diktöversikt
National Category
Specific Languages
Research subject
Scandinavian Languages
Identifiers
urn:nbn:se:uu:diva-133904 (URN)
Projects
Originalversionen av Snorre Sturlassons Edda? Studier i Codex Upsaliensis.
Available from: 2010-11-18 Created: 2010-11-18 Last updated: 2018-01-12Bibliographically approved
Mårtensson, L. (2009). Digital utgåva av den isländska handskriften AM 557 4to.
Open this publication in new window or tab >>Digital utgåva av den isländska handskriften AM 557 4to
2009 (Swedish)Other (Other academic)
Keywords
digital utgåva, Skálholtsbók
National Category
Specific Languages
Research subject
Scandinavian Languages
Identifiers
urn:nbn:se:uu:diva-133905 (URN)
Available from: 2010-11-18 Created: 2010-11-18 Last updated: 2018-01-12
Mårtensson, L. (2009). Isolerade graftyper i DG 11 (Codex Upsaliensis). In: Agneta Ney, Henrik Williams & Fredrik Charpentier Ljungqvist (Ed.), Á austrvega. Saga and East Scandinavia: Preprint papers of The 14th International Saga Conference. Volume 2. Paper presented at The 14th International Saga Conference (pp. 657-658). Uppsala
Open this publication in new window or tab >>Isolerade graftyper i DG 11 (Codex Upsaliensis)
2009 (English)In: Á austrvega. Saga and East Scandinavia: Preprint papers of The 14th International Saga Conference. Volume 2 / [ed] Agneta Ney, Henrik Williams & Fredrik Charpentier Ljungqvist, Uppsala, 2009, p. 657-658Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Uppsala: , 2009
Keywords
Graftyp, DG 11, Snorra Edda
National Category
Specific Languages
Research subject
Scandinavian Languages
Identifiers
urn:nbn:se:uu:diva-121270 (URN)
Conference
The 14th International Saga Conference
Available from: 2010-03-20 Created: 2010-03-20 Last updated: 2018-01-12Bibliographically approved
Mårtensson, L. & Pálsson, H. (2008). Anmärkningsvärda suspensioner i DG 11 4to (Codex Upsaliensis av Snorra Edda): Spåren av en skriven förlaga?. Scripta Islandica: Isländska Sällskapets Årsbok, 59, 135-155
Open this publication in new window or tab >>Anmärkningsvärda suspensioner i DG 11 4to (Codex Upsaliensis av Snorra Edda): Spåren av en skriven förlaga?
2008 (Swedish)In: Scripta Islandica: Isländska Sällskapets Årsbok, ISSN 0582-3234, E-ISSN 2001-9416, Vol. 59, p. 135-155Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Uppsala: , 2008
Keywords
Snorra Edda, Uppsala-Eddan, abbreviaturer
National Category
Specific Languages
Research subject
Scandinavian Languages
Identifiers
urn:nbn:se:uu:diva-121269 (URN)
Available from: 2010-03-20 Created: 2010-03-20 Last updated: 2018-01-12Bibliographically approved
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