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Publications (10 of 31) Show all publications
Mårtensson, L. (2017). Anna Catharina Horn: Lov og tekst i middelalderen. Produksjon og resepsjon av Magnus Lagabøtes landslov [Review]. European Journal of Scandinavian Studies
Open this publication in new window or tab >>Anna Catharina Horn: Lov og tekst i middelalderen. Produksjon og resepsjon av Magnus Lagabøtes landslov
2017 (Swedish)In: European Journal of Scandinavian Studies, ISSN 2191-9399, E-ISSN 2191-9402Article, book review (Other academic) In press
Place, publisher, year, edition, pages
Kiel: , 2017
Keywords
Nordiska språk, filologi, textkritik
National Category
Specific Languages
Identifiers
urn:nbn:se:hig:diva-25776 (URN)
Available from: 2017-12-09 Created: 2017-12-09 Last updated: 2018-03-13Bibliographically approved
Mårtensson, L. (2017). Editionsfilologi och språkhistorisk forskning (1ed.). In: Ulrika Serrander & Peder Tahlén (Ed.), Kunskap Motstånd Möjlighet: Humanistiskt forskning i dag (pp. 64-84). Halmstad: Molin & Sorgenfrei
Open this publication in new window or tab >>Editionsfilologi och språkhistorisk forskning
2017 (Swedish)In: Kunskap Motstånd Möjlighet: Humanistiskt forskning i dag / [ed] Ulrika Serrander & Peder Tahlén, Halmstad: Molin & Sorgenfrei, 2017, 1, p. 64-84Chapter in book (Refereed)
Place, publisher, year, edition, pages
Halmstad: Molin & Sorgenfrei, 2017 Edition: 1
Keywords
Filologi, språkhistoria, textutgivning
National Category
Specific Languages
Identifiers
urn:nbn:se:hig:diva-25775 (URN)978-91-87515-99-6 (ISBN)
Available from: 2017-12-09 Created: 2017-12-09 Last updated: 2018-03-13Bibliographically approved
Mårtensson, L., Brun, A. & Wahlberg, F. (2017). Paleografiska egenskaper ur ett digitalt perspektiv. In: Jonathan Adams & Massimiliano Bampi (Ed.), Beyond the Piraeus : Lion East Norse Studies from Venice. København: Universitets-Jubilæets danske Samfund, 2
Open this publication in new window or tab >>Paleografiska egenskaper ur ett digitalt perspektiv
2017 (Swedish)In: Beyond the Piraeus : Lion East Norse Studies from Venice / [ed] Jonathan Adams & Massimiliano Bampi, København: Universitets-Jubilæets danske Samfund , 2017, Vol. 2Chapter in book (Refereed)
Place, publisher, year, edition, pages
København: Universitets-Jubilæets danske Samfund, 2017
Series
Selskab for østnordisk filologi / Universitets-Jubilæets danske Samfund ; 2 / 594
National Category
Other Humanities
Identifiers
urn:nbn:se:hig:diva-25235 (URN)9788740831092 (ISBN)
Projects
Nya ögon på Sveriges medeltida skrivare
Funder
Riksbankens Jubileumsfond, NHS14-2068:1
Available from: 2017-09-14 Created: 2017-09-14 Last updated: 2019-01-08Bibliographically approved
Wahlberg, F., Mårtensson, L. & Brun, A. (2016). Estimating manuscript production dates using both image and language data. In: Proceedings of SSBA, 2016: . Paper presented at SSBA Symposium 2016, 14-16 mars 2016, Uppsala.
Open this publication in new window or tab >>Estimating manuscript production dates using both image and language data
2016 (English)In: Proceedings of SSBA, 2016, 2016Conference paper, Published paper (Other academic)
National Category
Computer Vision and Robotics (Autonomous Systems) Languages and Literature
Research subject
Computerized Image Processing
Identifiers
urn:nbn:se:hig:diva-25290 (URN)
Conference
SSBA Symposium 2016, 14-16 mars 2016, Uppsala
Projects
q2bq2b_vr2012
Funder
Swedish Research Council, 2012-5743
Available from: 2016-08-18 Created: 2017-09-18 Last updated: 2018-03-13Bibliographically approved
Wahlberg, F., Mårtensson, L. & Brun, A. (2016). Large scale continuous dating of medieval scribes using a combined image and language model. In: Proceedings - 12th IAPR International Workshop on Document Analysis Systems, DAS 2016: . Paper presented at 12th IAPR International Workshop on Document Analysis Systems, DAS 2016, 11-14 April 2016, Santorini, Greece (pp. 48-53). , Article ID 7490092.
Open this publication in new window or tab >>Large scale continuous dating of medieval scribes using a combined image and language model
2016 (English)In: Proceedings - 12th IAPR International Workshop on Document Analysis Systems, DAS 2016, 2016, p. 48-53, article id 7490092Conference 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. 

Keywords
Character recognition, Computational linguistics, Modeling languages, Students, Absolute error, Combined images, Estimation schemes, Historical research, Image data, Language model, Medieval manuscript, Statistical modeling, Transcription
National Category
Language Technology (Computational Linguistics)
Identifiers
urn:nbn:se:hig:diva-22524 (URN)10.1109/DAS.2016.71 (DOI)000390411200009 ()2-s2.0-84979500480 (Scopus ID)
Conference
12th IAPR International Workshop on Document Analysis Systems, DAS 2016, 11-14 April 2016, Santorini, Greece
Available from: 2016-09-28 Created: 2016-09-28 Last updated: 2018-03-13Bibliographically approved
Óskarsson, V. & Mårtensson, L. (Eds.). (2016). Scripta Islandica: Isländska sällskapets årsbok 67/2016. Uppsala: Isländska sällskapet
Open this publication in new window or tab >>Scripta Islandica: Isländska sällskapets årsbok 67/2016
2016 (Swedish)Collection (editor) (Refereed)
Place, publisher, year, edition, pages
Uppsala: Isländska sällskapet, 2016. p. 160
Series
Scripta Islandica: Isländska sällskapets årsbok, ISSN 0582-3234 ; 67
National Category
Humanities and the Arts
Identifiers
urn:nbn:se:hig:diva-25292 (URN)
Available from: 2017-09-18 Created: 2017-09-18 Last updated: 2018-03-13Bibliographically approved
Mårtensson, L., Wahlberg, F. & Brun, A. (2015). Digital Palaeography and the Old Swedish Script: The Quill Feature Method as a Tool for Scribal Attribution. Arkiv för nordisk filologi, 130, 79-100
Open this publication in new window or tab >>Digital Palaeography and the Old Swedish Script: The Quill Feature Method as a Tool for Scribal Attribution
2015 (English)In: Arkiv för nordisk filologi, ISSN 0066-7668, Vol. 130, p. 79-100Article in journal (Refereed) Published
Abstract [en]

In this article, the so-called Quill Feature method is tested as a means for scribal attribution in mediaeval manuscripts and placed in a palaeographic context. The Quill Features encompass a range of measurable features such as stroke curvature and variation in the width of strokes that graphs are comprised of, giving consideration to the angle at which they are drawn. The construction of the mediaeval pen, the quill, creates variation in the width of strokes, most importantly due to direction and force of pressure. It has been assumed that individual patterns can be discerned in this variation. The manuscript chosen for investigation is Cod. Ups. C 61, which contains a number of St Birgitta's Revelations and other material connected with this saint. Earlier researchers claimed that three or four scribes produced this manuscript, and this assertion was tested with the Quill Feature method. It transpired that the resultant values, calculated through measuring the investigated features, were very similar for the pages produced by the same scribe, which means that the method identifies important regularities in the scribal hands. Nevertheless, some of the investigated hands showed great similarities and were difficult for the computer to separate. Finally, the strengths and weaknesses of the digital methods of script analysis are discussed. The main advantage of these approaches is that a computer can measure characteristics of the script that cannot be discerned with the naked eye, and with a high degree of exactness. One weakness is that the measurements obtained are given in numbers, and can thus be difficult to apply to the script signs. Furthermore, one single method cannot provide a full description of script characteristics, so a combination of methods, both digital and manual, is desirable.

Keywords
Quill features, paleography, writer identification
National Category
Specific Languages
Identifiers
urn:nbn:se:hig:diva-19435 (URN)2-s2.0-84961205527 (Scopus ID)
Projects
Sökning och informationsutvinning i stora samlingar av historiska handskrivna dokument
Funder
Swedish Research Council, 2012-5743
Available from: 2015-06-02 Created: 2015-06-02 Last updated: 2018-03-22Bibliographically approved
Mårtensson, L. (2015). Digital paleografi och den medeltida skriften i Sverige: En introduktion samt en applikation. Kungl. Humanistiska vetenskaps-samfundet i Uppsala = Annales Societatis litterarum humaniorum regiae Upsaliensis, 2014
Open this publication in new window or tab >>Digital paleografi och den medeltida skriften i Sverige: En introduktion samt en applikation
2015 (Swedish)In: Kungl. Humanistiska vetenskaps-samfundet i Uppsala = Annales Societatis litterarum humaniorum regiae Upsaliensis, ISSN 0349-0416, Vol. 2014Article, review/survey (Other academic) Published
Place, publisher, year, edition, pages
Uppsala: Kungl. Humanistiska Vetenskaps-Samfundet i Uppsala, 2015
Keywords
Paleografi, digital humaniora, bildanalys
National Category
Specific Languages
Identifiers
urn:nbn:se:hig:diva-20658 (URN)
Funder
Swedish Research Council, 2012-5743
Available from: 2015-11-25 Created: 2015-11-25 Last updated: 2018-03-13Bibliographically approved
Wahlberg, F., Mårtensson, L. & Brun, A. (2015). Large scale style based dating of medieval manuscripts. In: Proceedings of the 3rd International Workshop on Historical Document Imaging and Processing (HIP’15): . Paper presented at 3rd International Workshop on Historical Document Imaging and Processing (HIP’15), 22 August 2015, Nancy, France (pp. 107-114). New York: ACM Digital Library
Open this publication in new window or tab >>Large scale style based dating of medieval manuscripts
2015 (English)In: Proceedings of the 3rd International Workshop on Historical Document Imaging and Processing (HIP’15), New York: ACM Digital Library, 2015, p. 107-114Conference paper, Published paper (Refereed)
Abstract [en]

In this paper we propose a novel approach for manuscript dating based on shape statistics. Our goal was to develop a strategy well suited for a large scale dating effort where heterogeneous collections of thousands of manuscripts could be automatically processed. The proposed method takes the gray scale image as input. Uses the stroke width transform and a statistical model of the gradient image to find ink boundaries. Finally, a distribution over common shapes, quantified using shape context descriptors, is produced for each manuscript image. The proposed method is binarization free, rotational invariant and requires minimal segmentation. Also, we propose parameters estimation schemes, simplifying the deployment process. We evaluate our work on the 10000+ manuscripts collection “Svenskt diplomatariums huvudkarotek”, consisting of charters from the medieval period of todays Sweden. The images, originally intended for web viewing, were of low quality and had compression artifacts, but could still be dated with a median absolute error of < 19 years. Due to unsupervised feature learning and regression, we get these results using only 5% of the labels in the estimator training

Place, publisher, year, edition, pages
New York: ACM Digital Library, 2015
Keywords
Palaeography, digital humanities, manuscript studies, image analysis
National Category
Specific Languages
Identifiers
urn:nbn:se:hig:diva-20194 (URN)10.1145/2809544.2809560 (DOI)2-s2.0-85014972343 (Scopus ID)978-1-4503-3602-4 (ISBN)
Conference
3rd International Workshop on Historical Document Imaging and Processing (HIP’15), 22 August 2015, Nancy, France
Projects
Sökning och informationsutvinning i stora samlingar av handskrivna historiska dokument
Funder
Swedish Research Council, 2012-5743
Available from: 2015-09-02 Created: 2015-09-02 Last updated: 2018-03-22Bibliographically approved
Mårtensson, L. (2015). Maskinell identifiering av skrivtecken i medeltida handskrifter ur ett språkvetenskapligt perspektiv. Danske studier, 587, 109-120
Open this publication in new window or tab >>Maskinell identifiering av skrivtecken i medeltida handskrifter ur ett språkvetenskapligt perspektiv
2015 (Swedish)In: Danske studier, ISSN 0106-4525, E-ISSN 2246-8323, Vol. 587, p. 109-120Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Odense: Universitets-Jubilæets danske Samfund, 2015
Keywords
Quill features, paleography, writer identification
National Category
Specific Languages
Identifiers
urn:nbn:se:hig:diva-19648 (URN)
Funder
Swedish Research Council, 2012-5743
Available from: 2015-06-15 Created: 2015-06-15 Last updated: 2018-03-22Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-5072-4961

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