Characterisation of Spatial Techniques for Optimised Use in Cultural Heritage Documentation

Wiemann, Ann-Kathrin; Boochs, Frank; Karmacharya, Ashish; Wefers, Stefanie

doi:10.1007/978-3-319-13695-0_36

Cited by 4 publications

(2 citation statements)

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“…Because of the geometric accuracy and micro-resolution required, only high-resolution structured light techniques, embedded in a frame of close-range photogrammetry, are able to provide the necessary quality. Although these techniques are well known and well tested [4][5][6], their application has been made difficult by the position of the object about 4 m above the ground and the limited possibilities to use installations on or around the object. The analysis of changes over time therefore also had to be done in a relative manner.…”

Section: Imaging Techniques Usedmentioning

confidence: 99%

Use of Imaging Techniques as a Support for the Preventive Conservation Strategy of Wall Paintings: Application to the Medieval Decors of the Château de Germolles

Degrigny

Boochs

Raddatz

et al. 2020

Lecture Notes in Computer Science

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Imaging techniques were used to document and monitor physical damage to the unique wall paintings at the Château de Germolles, Burgundy, France. Photogrammetry combined with scanning are the most appropriate techniques to monitor the evolution of microcrack networks in the cornice overhanging the paintings and preserved as a witness to 19th century additions.However, the application of these techniques was challenged due to the given constraints of a working height of 4 m and the required accuracy of a tenth of a millimetre. A special effort was therefore necessary to ensure sufficient stability of the acquisition protocol and to make it relevant during the four measurement campaigns planned over the two years of the project.The analysis of photogrammetric data has made it possible to document certain macro-deformations of the cornice according to the seasons of the year. The microcracks could be visualized and monitored from transformed 3D models of each segment for the different campaigns. The results obtained show only local movements, mainly on the walls that are most exposed to the specific climatic conditions of each season.

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Section: Imaging Techniques Usedmentioning

confidence: 99%

Use of Imaging Techniques as a Support for the Preventive Conservation Strategy of Wall Paintings: Application to the Medieval Decors of the Château de Germolles

Degrigny

Boochs

Raddatz

et al. 2020

Lecture Notes in Computer Science

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“…Through these five top-level classes all aspects relevant within a digitisation and visualisation process, from the data acquisition to the data processing and data usage, are covered and can be integrated. The classes especially of the technical branches are already created through a global view on expert knowledge (Wiemann, Wefers, Karmacharya, & Boochs, 2014). Through logical rules and dependencies, a link between the CH application and the data requirements is established which allows users to exploit the ontology and retrieving recommendations.…”

Section: Cosch Kr Ontologymentioning

confidence: 99%

Development of a platform recommending 3D and spectral digitisation strategies

Wefers

Karmacharya

Boochs

2016

Virtual archaeol. rev.

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Abstract:Spatial and spectral recording of cultural heritage objects is a complex task including data acquisition, processing and analysis involving different technical disciplines. Additionally, the development of a suitable digitisation strategy satisfying the expectations of the humanities experts needs an interdisciplinary dialogue often suffering from misunderstanding and knowledge gaps on both the technical and humanities sides.Through a concerted discussion, experts from the cultural heritage and technical domains currently develop a so-called COSCH KR (Colour and Space in Cultural Heritage Knowledge Representation) platform that will give recommendations for spatial and spectral recording strategies adapted to the needs of the cultural heritage application. The platform will make use of an ontology through which the relevant parameters of the different domains involved in the recording, processing, analysis, and dissemination of cultural heritage objects are hierarchically structured and related through rulebased dependencies. Background and basis for this ontology is the fact that a deterministic relation exists between (1) the requirements of a cultural heritage application on spatial, spectral, as well as visual digital information of a cultural heritage object which itself has concrete physical characteristics and (2) the technical possibilities of the spectral and spatial recording devices. Through a case study which deals with the deformation analysis of wooden samples of cultural heritage artefacts, this deterministic relationship is illustrated explaining the overall structure and development of the ontology.The aim of the COSCH KR platform is to support cultural heritage experts finding the best suitable recording strategy for their often unique physical cultural heritage object and research question. The platform will support them and will make them aware of the relevant parameters and limitations of the recording strategy with respect to the characteristics of the cultural heritage object, external influences, application, recording devices, and data.

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