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Jonsson, Torsten
Publications (8 of 8) Show all publications
Liu, F., Jonsson, T. & Seipel, S. (2020). Evaluation of augmented reality-based building diagnostics using third person perspective. ISPRS International Journal of Geo-Information, 9(1), Article ID 53.
Open this publication in new window or tab >>Evaluation of augmented reality-based building diagnostics using third person perspective
2020 (English)In: ISPRS International Journal of Geo-Information, ISSN 2220-9964, Vol. 9, no 1, article id 53Article in journal (Other academic) Published
Abstract [en]

Comprehensive user evaluations of outdoor augmented reality (AR) applications in the architecture, engineering, construction and facilities management (AEC/FM) industry are rarely reported in the literature. This paper presents an AR prototype system for infrared thermographic façade inspection and its evaluation. The system employs markerless tracking based on image registration using natural features and a third person perspective (TPP) augmented view displayed on a hand-held smart device. We focus on evaluating the system in user experiments with the task of designating positions of heat spots on an actual façade as if acquired through thermographic inspection. User and system performance were both assessed with respect to target designation errors. The main findings of this study show that positioning accuracy using this system is adequate for objects of the size of one decimeter. After ruling out the system inherent errors, which mainly stem from our application-specific image registration procedure, we find that errors due to a human’s limited visual-motoric and cognitive performance, which have a more general implication for using TPP AR for target designation, are only a few centimeters.

Place, publisher, year, edition, pages
MDPI, 2020
Keywords
augmented reality, infrared thermography, façade inspection, positioning task, third person perspective, user performance study, mental rotation
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:hig:diva-31617 (URN)10.3390/ijgi9010053 (DOI)000514631100034 ()2-s2.0-85078073280 (Scopus ID)
Available from: 2020-02-03 Created: 2020-02-03 Last updated: 2020-03-17Bibliographically approved
Jonsson, T. (2006). Programmering i fokus: grundläggande programutveckling i Visual Basic .NET. Lund: Studentlitteratur
Open this publication in new window or tab >>Programmering i fokus: grundläggande programutveckling i Visual Basic .NET
2006 (Swedish)Book (Other (popular science, discussion, etc.))
Place, publisher, year, edition, pages
Lund: Studentlitteratur, 2006. p. 500
National Category
Software Engineering
Identifiers
urn:nbn:se:hig:diva-2291 (URN)91-44-01613-1 (ISBN)
Available from: 2006-09-29 Created: 2006-09-29 Last updated: 2018-03-13Bibliographically approved
Öman, M. & Jonsson, T. (2004). Om ett pedagogiskt arbete på en högskoleavdelning. In: Sara Dahlström och Göran Fransson (Ed.), Kunskap och lärande i den högre utbildningen: lärarreflexioner från praktiken (pp. 39-52). Gävle: Högskolan i Gävle
Open this publication in new window or tab >>Om ett pedagogiskt arbete på en högskoleavdelning
2004 (Swedish)In: Kunskap och lärande i den högre utbildningen: lärarreflexioner från praktiken / [ed] Sara Dahlström och Göran Fransson, Gävle: Högskolan i Gävle , 2004, p. 39-52Chapter in book (Other (popular science, discussion, etc.))
Place, publisher, year, edition, pages
Gävle: Högskolan i Gävle, 2004
Series
Pedagogiska rådets skriftserie, ISSN 1653-0276 ; 1
National Category
Pedagogy Pedagogical Work
Identifiers
urn:nbn:se:hig:diva-1983 (URN)91-974948-5-2 (ISBN)
Available from: 2008-06-13 Created: 2008-06-13 Last updated: 2018-07-02Bibliographically approved
Jonsson, T. & Hamfelt, A. (2003). DAViLa – A Domain Adaptable Visual Language. In: Human Centric Computing Languages and Environments. Paper presented at IEEE Symposium on Human Centric Computing Languages and Environment, Auckland, New Zealand, 28-31 Oct. 2003.
Open this publication in new window or tab >>DAViLa – A Domain Adaptable Visual Language
2003 (English)In: Human Centric Computing Languages and Environments, 2003Conference paper, Published paper (Other academic)
Abstract [en]

We present a framework where different visual notations may be implemented to suit different domains. The major characteristic of DAViLa is that it provides a domain in-dependent framework to programming, using components of interest for specific domains. A domain adaptation is achieved through implementation of domain specific components, which are added to the framework. The semantics of the framework is based on Combilog, a com-positional programming method for relational programs. In Combilog, programming semantically is composition of sets of tuples

Keywords
Compositional logic, VPL, Visual language, Program structures, Operators, Sets, Declarative
National Category
Computer Sciences
Identifiers
urn:nbn:se:hig:diva-1173 (URN)10.1109/HCC.2003.1260212 (DOI)000189347900017 ()0-7803-8225-0 (ISBN)
Conference
IEEE Symposium on Human Centric Computing Languages and Environment, Auckland, New Zealand, 28-31 Oct. 2003
Available from: 2008-01-10 Created: 2008-01-10 Last updated: 2018-03-13Bibliographically approved
Jonsson, T. (2003). Programmering i fokus: grundläggande programutveckling i Visual Basic.NET. Lund: Studentlitteratur
Open this publication in new window or tab >>Programmering i fokus: grundläggande programutveckling i Visual Basic.NET
2003 (Swedish)Book (Other academic)
Place, publisher, year, edition, pages
Lund: Studentlitteratur, 2003. p. 476
Identifiers
urn:nbn:se:hig:diva-1035 (URN)91-44-02954-3 (ISBN)
Available from: 2007-12-12 Created: 2007-12-12 Last updated: 2018-03-13Bibliographically approved
Jonsson, T. (2003). Visual Basic i Fokus: grundläggande applikationsutveckling och programmering version 6 (3ed.). Lund: Studentlitteratur
Open this publication in new window or tab >>Visual Basic i Fokus: grundläggande applikationsutveckling och programmering version 6
2003 (Swedish)Book (Other academic)
Place, publisher, year, edition, pages
Lund: Studentlitteratur, 2003. p. 442 Edition: 3
Identifiers
urn:nbn:se:hig:diva-1034 (URN)91-44-04252-3 (ISBN)
Available from: 2007-12-12 Created: 2007-12-12 Last updated: 2018-03-13Bibliographically approved
Crnkovic, I., Hnich, B., Jonsson, T. & Kiziltan, Z. (2002). Basic Concepts in CBSE. In: Ivica Crnkovic, Magnus Larsson (Ed.), Building Reliable Component-Based Software Systems. Boston: Artech House Publishers
Open this publication in new window or tab >>Basic Concepts in CBSE
2002 (English)In: Building Reliable Component-Based Software Systems / [ed] Ivica Crnkovic, Magnus Larsson, Boston: Artech House Publishers , 2002Chapter in book (Other academic)
Place, publisher, year, edition, pages
Boston: Artech House Publishers, 2002
Identifiers
urn:nbn:se:hig:diva-1017 (URN)1-58053-327-2 (ISBN)
Available from: 2007-12-12 Created: 2007-12-12 Last updated: 2018-03-13Bibliographically approved
Crnkovic, I., Hnich, B., Jonsson, T. & Kiziltan, Z. (2002). Specification, implementation, and deployment of components. Communications of the ACM, 45(10), 35-40
Open this publication in new window or tab >>Specification, implementation, and deployment of components
2002 (English)In: Communications of the ACM, ISSN 0001-0782, E-ISSN 1557-7317, Vol. 45, no 10, p. 35-40Article in journal (Refereed) Published
Identifiers
urn:nbn:se:hig:diva-1019 (URN)10.1145/570907.570928 (DOI)
Available from: 2007-12-12 Created: 2007-12-12 Last updated: 2018-03-13Bibliographically approved
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