Paul Bayer

Geodesic distances and Voronoi cells for the art historic analysis of the Sabouroff head. This video is based on the publication "Der Kopf Sabouroff in Berlin: Zwischen archaologischer Beobachtung und geometrischer Vermessung" by Tonio Holscher, Susanne Kromker and Hubert Mara, in: Gedenkschrift fur Georgios Despinis, Griechenland 2020.

This video demonstrates the digital creation of a profile line i.e. drawing of a ceramic fragment, which was captured using a 3D-scanner. Such fragments also known as sherds are among the most common findings at archaeological excavations. The rim sherd shown as an example was part of a bowl. It was found 2017 during excavations in the Roman vicus of Gleisdorf, Styria, Austria. It belongs to a group of fine ware which is called "Pannonische Glanztonware“ (PGW, Pannonian glazed pottery), which was produced between flavian times and the beginning of the 3rd century AD. PGW imitated Samian Ware vessels regarding their forms and also decorations. Usually burnt in a de-oxidizing atmosphere in the kiln and therefor black or grey, the example shown was burnt in an oxidizing atmosphere and is therefore of orange color. Related publications for computing drawings of ceramic fragments are: [1] Hubert Mara, Martin Kampel and Robert Sablatnig, “Preprocessing of 3D-Data for Classification of Archaeological Fragments in an Automated System“, in: Leberl F., Fraundorfer F., (Eds.), “Vision with Non-Traditional Sensors, Proc. of the 26th Workshop of the Austrian Association for Pattern Recognition (OEAGM)“, Schriftenreihe der OCG, Vol. 160, pp. 257-264, 2002. [2] Robert Sablatnig and Hubert Mara, "Orientation of Fragments of Rotationally Symmetrical 3D-Shapes for Archaeological Documentation," 3D Data Processing Visualization and Transmission, International Symposium on(3DPVT), University of North Carolina, Chapel Hill, USA, 2006, pp. 1064-1071. doi:10.1109/3DPVT.2006.105 [3] Hubert Mara and Julia Portl, “Acquisition and Documentation of Vessels using High-Resolution 3D-Scanners”, in: Trinkl E., Corpus Vasorum Antiquorum Osterreich-Beiheft 1, pp. 25-40, Verlag der Osterreichischen Akademie der Wissenschaften, Vienna, Austria, 2013.

This video demonstrates an umbrella transformation using a cone to unwrap an archaeological finding acquired using a 3D-scanner based on the principle of structured light. The unwrapping was published by Bastian Rieck, Hubert Mara, and Susanne Kromker: Unwrapping Highly-Detailed 3D Meshes of Rotationally Symmetric Man-Made Objects, in proc. of the XXIV. CIPA 2013 Symposium Recording, Documentation and Cooperation for Cultural Heritage. ISPRS - International Society for Photogrammetry and Remote Sensing 2013, pp. 259-264 (ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.; II-5/W). The rollout of the object was published by Paul Bayer and Susanne Lamm: Mehr als nur Ben Hur – Eine 3D-Abrollung des romischen Silberbechers von Grunau, Steiermark, Forum Archaeologiae 87/VI/2018.

This video demonstrates another umbrella transformation using a sphere to unwrap an archaeological finding acquired using Structure from Motion (SfM). The unwrapping was published by Bastian Rieck, Hubert Mara, and Susanne Kromker: Unwrapping Highly-Detailed 3D Meshes of Rotationally Symmetric Man-Made Objects, in proc. of the XXIV. CIPA 2013 Symposium Recording, Documentation and Cooperation for Cultural Heritage. ISPRS - International Society for Photogrammetry and Remote Sensing 2013, pp. 259-264 (ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.; II-5/W). The object shown as an example is the Aryballos KFUG IA Inv. G 26 of the collection of the Institut fur Archaologie, Karl-Franzens-Universitat Graz, Austria. More information can be found via the permalink: http://gams.uni-graz.at/o:arch.2478

Profile-drawings and tracings are essential elements of a throughout scientific object documentation in archaeological pottery studies. Within the study of Greek pottery, unwrappings of painted surfaces have a long tradition and a still well-deserved high significance. They show the depiction without photographic distortions or sectioning, enabling archaeologists to analyse and interpret the image as a whole. This is especially true in the case of Corinthian pottery, where the poor preservation of the painting tending to flake off often results in unclear photographs. Nevertheless, traces of flaked off painting layers are still visible on the surface under specific illumination. Creating profile-drawings and unwrappings manually is time-consuming. Manual acquisition with tactile tools like lead wires, profile combs or tracing paper is often not allowed due to the fragile nature of the surfaces. To facilitate this task for pottery archaeologists, we propose a combination of 3D data d...

Archaologische Projekte sind am Ausgrabungsort oft mit der Verarbeitung von extrem grosen Mengen von keramischem Material konfrontiert. Ublicherweise ist das Handzeichnen von diagnostischen Scherben und Gefasen essenzieller Bestandteil von Dokumentation und Analyse des Fundgutes. Dies ist insbesondere bei komplexen Gefasformen sehr zeitaufwendig. Das Archaologische Projekt Guadalupe arbeitet im Nordosten von Honduras mit dem Ziel, die lokale Kultur der Cocal-Periode (1000-1525 n. Chr.) zu charakterisieren. Wahrend der Untersuchungen verglich das Projekt systematisch die Vorteile traditioneller Handzeichnungstechniken mit moderneren Ansatzen, wie z.B. der 3D-Modellierung und 3D-Datenverarbeitung, um einen effektiven Arbeitsablauf fur die Dokumentation vor Ort zu entwickeln. Durch eine Kombination aus Scannen mit strukturiertem Licht, traditioneller Handzeichnung und der automatischen Erzeugung von Profilzeichnungen mit der 3D-Software GigaMesh konnten wir unsere Arbeit mit unterschie...

This video demonstrates another umbrella transformation using a sphere to unwrap an archaeological finding acquired using Structure from Motion (SfM). The unwrapping was published by Bastian Rieck, Hubert Mara, and Susanne Kromker: Unwrapping Highly-Detailed 3D Meshes of Rotationally Symmetric Man-Made Objects, in proc. of the XXIV. CIPA 2013 Symposium Recording, Documentation and Cooperation for Cultural Heritage. ISPRS - International Society for Photogrammetry and Remote Sensing 2013, pp. 259-264 (ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.; II-5/W). The object shown as an example is the Aryballos KFUG IA Inv. G 26 of the collection of the Institut fur Archaologie, Karl-Franzens-Universitat Graz, Austria. More information can be found via the permalink: http://gams.uni-graz.at/o:arch.2478

This video demonstrates an umbrella transformation using a cone to unwrap an archaeological finding acquired using a 3D-scanner based on the principle of structured light. The unwrapping was published by Bastian Rieck, Hubert Mara, and Susanne Kromker: Unwrapping Highly-Detailed 3D Meshes of Rotationally Symmetric Man-Made Objects, in proc. of the XXIV. CIPA 2013 Symposium Recording, Documentation and Cooperation for Cultural Heritage. ISPRS - International Society for Photogrammetry and Remote Sensing 2013, pp. 259-264 (ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.; II-5/W). The rollout of the object was published by Paul Bayer and Susanne Lamm: Mehr als nur Ben Hur – Eine 3D-Abrollung des romischen Silberbechers von Grunau, Steiermark, Forum Archaeologiae 87/VI/2018.

This video demonstrates the digital creation of a profile line i.e. drawing of a ceramic fragment, which was captured using a 3D-scanner. Such fragments also known as sherds are among the most common findings at archaeological excavations. The rim sherd shown as an example was part of a bowl. It was found 2017 during excavations in the Roman vicus of Gleisdorf, Styria, Austria. It belongs to a group of fine ware which is called "Pannonische Glanztonware“ (PGW, Pannonian glazed pottery), which was produced between flavian times and the beginning of the 3rd century AD. PGW imitated Samian Ware vessels regarding their forms and also decorations. Usually burnt in a de-oxidizing atmosphere in the kiln and therefor black or grey, the example shown was burnt in an oxidizing atmosphere and is therefore of orange color. Related publications for computing drawings of ceramic fragments are: [1] Hubert Mara, Martin Kampel and Robert Sablatnig, “Preprocessing of 3D-Data for Classification o...

Geodesic distances and Voronoi cells for the art historic analysis of the Sabouroff head. This video is based on the publication "Der Kopf Sabouroff in Berlin: Zwischen archaologischer Beobachtung und geometrischer Vermessung" by Tonio Holscher, Susanne Kromker and Hubert Mara, in: Gedenkschrift fur Georgios Despinis, Griechenland 2020.

In the framework of the research project on the Roman marble quarry zone of Spitzelofen (Austria) the visible quarry faces with extraction traces were completely documented by 3D data acquisition methods (on a surface of 230 m² in total). For this we used Structure-from-Motion technique (camera and drone) georeferenced by tachymetric measurements. Together with the additionally found 30 quarry tools like picks or wedges, the abundant archaeological record of quarrying traces on this site gives a unique opportunity for understanding Roman extraction techniques. In this contribution we explore the relationship between tools and tool marks as well as the quarrying procedure executed by these tools to gain marble blocks. The half negative traces of trenches preserved on the quarry faces reveal the specific trench cutting procedure while traces of channels and wedge holes on the quarry sole the splitting techniques. All these used techniques of stoneworking can be directly confronted with the used tools. The 3D data enables a qualitative and quantitative analysis of these quarrying traces. We evaluate the trench cutting procedure with regard to the distances of the single quarrying grooves and the block sizes obtained from the distances between ledges and intersections of trenches. It can be shown that the applied techniques are relatively homogeneous in the whole quarry zone with more than 18 marble quarries. They vary only in specific details depending on the respective micro-local geological constraints and obviously on the respective skills of the quarry workers. Additionally, the investigation of the quarry faces provide a lot of details for explaining the formation of the ledges and of the vertical concavity of the trench wall. Wedge splitting which was only observed as lifting splitting, shows a regular system which consists of a small V-shaped channel with a depth of ca. 15‒25 cm, in whose base wedge holes or a continuous slot are chiselled; a technique very similar to the evidence at Carrara. The quantitative analysis of quarrying traces using 3D techniques provides an appropriate visual indication of the level of intensity of an exploited marble resource. Especially in comparison with marble resources of other sites this data will be of importance.