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3D inspection of the restoration and conservation of stained glass windows using high resolution structured light scanning

  • The initial focus of this research was on the development of a general workflow for the documentation and monitoring of historical stained glass windows using structured light scanning. Therefore windows from different churches, time periods and with different corrosion and damage phenomena were scanned before and after conservation measures. To evaluate the execution of the restoration measures the data was compared using 3D inspection software to examine the differences in geometry between the two scans. Various problems had to be solved, for example, how to deal with heavily reflective surfaces and the extreme contrast between light and dark surfaces, as seen in the borders between ‘Schwarzlot’ painting and plain glass. The application of materials for matting the surfaces, such as Cyclododecane spray, was impossible due to the high accuracy of the surface measurement required for 3D inspection. Regarding the contrast differences of the surfaces, the creation of exposure fusions andThe initial focus of this research was on the development of a general workflow for the documentation and monitoring of historical stained glass windows using structured light scanning. Therefore windows from different churches, time periods and with different corrosion and damage phenomena were scanned before and after conservation measures. To evaluate the execution of the restoration measures the data was compared using 3D inspection software to examine the differences in geometry between the two scans. Various problems had to be solved, for example, how to deal with heavily reflective surfaces and the extreme contrast between light and dark surfaces, as seen in the borders between ‘Schwarzlot’ painting and plain glass. The application of materials for matting the surfaces, such as Cyclododecane spray, was impossible due to the high accuracy of the surface measurement required for 3D inspection. Regarding the contrast differences of the surfaces, the creation of exposure fusions and the use of polarization filters to reduce reflections were tested. In addition to the general problems encountered when recording translucent surfaces, the historical glasses caused additional problems in calculating surface comparisons. For example, the windows have to be moved and turned around several times, both during the conservation process and while scanning, causing deformations of the geometry due to the flexible lead rods allowing a certain degree of movement.zeige mehrzeige weniger

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Metadaten
Autor*innen:M. Rahrig, Manfred Torge
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (ISPRS Archives)
Jahr der Erstveröffentlichung:2019
Organisationseinheit der BAM:4 Material und Umwelt
4 Material und Umwelt / 4.5 Kunst- und Kulturgutanalyse
Veröffentlichende Institution:Bundesanstalt für Materialforschung und -prüfung (BAM)
Verlag:International Society of Photogrammetry and Remote Sensing (ISPRS)
Verlagsort:Hannover
Jahrgang/Band:XLII-2/W15
Erste Seite:965
Letzte Seite:972
DDC-Klassifikation:Naturwissenschaften und Mathematik / Chemie / Analytische Chemie
Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Sanitär- und Kommunaltechnik; Umwelttechnik
Freie Schlagwörter:3D inspection; Glass scanning; Restoration and conservation; Stained glass; Structured light scanning
Themenfelder/Aktivitätsfelder der BAM:Chemie und Prozesstechnik
Umwelt
Umwelt / Umwelt-Material-Interaktionen
Veranstaltung:27th CIPA International Symposium “Documenting the past for a better future”
Veranstaltungsort:Ávila, Spain
Beginndatum der Veranstaltung:01.09.2019
Enddatum der Veranstaltung:05.09.2019
DOI:10.5194/isprs-archives-XLII-2-W15-965-2019
URN:urn:nbn:de:kobv:b43-491286
Verfügbarkeit des Dokuments:Datei für die Öffentlichkeit verfügbar ("Open Access")
Lizenz (Deutsch):License LogoCreative Commons - CC BY - Namensnennung 4.0 International
Datum der Freischaltung:30.09.2019
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:28.12.2020
Schriftenreihen ohne Nummerierung:Wissenschaftliche Artikel der BAM
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