Development of a platform recommending 3D and spectral digitisation strategies

[EN] 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 COSCHKR platform (Colour and Space in Cultural Heritage Knowledge Representation) which 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 are related through rule-based 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 COSCHKR 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.This work was partly supported by COST under Action TD1201: Colour and Space in Cultural Heritage (COSCH).Wefers, S.; Karmacharya, A.; Boochs, F. (2016). Development of a platform recommending 3D and spectral digitisation strategies. Virtual Archaeology Review. 7(15):18-27. doi:10.4995/var.2016.5861.SWORD182771

Realistic visualisation of cultural heritage objects

This research investigation used digital photography in a hemispherical dome, enabling a set of 64 photographic images of an object to be captured in perfect pixel register, with each image illuminated from a different direction. This representation turns out to be much richer than a single 2D image, because it contains information at each point about both the 3D shape of the surface (gradient and local curvature) and the directionality of reflectance (gloss and specularity). Thereby it enables not only interactive visualisation through viewer software, giving the illusion of 3D, but also the reconstruction of an actual 3D surface and highly realistic rendering of a wide range of materials. The following seven outcomes of the research are claimed as novel and therefore as representing contributions to knowledge in the field: A method for determining the geometry of an illumination dome; An adaptive method for finding surface normals by bounded regression; Generating 3D surfaces from photometric stereo; Relationship between surface normals and specular angles; Modelling surface specularity by a modified Lorentzian function; Determining the optimal wavelengths of colour laser scanners; Characterising colour devices by synthetic reflectance spectra

Practice-Based Comparison of Imaging Methods for Visualization of Toolmarks on an Egyptian Scarab

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Virginia Commonwealth University Undergraduate Bulletin

Undergraduate bulletin for Virginia Commonwealth University for the academic year 2004-2005. It includes information on academic regulations, degree requirements, course offerings, faculty, academic calendar, and tuition and expenses for undergraduate programs

Virginia Commonwealth University Undergraduate Bulletin

Undergraduate bulletin for Virginia Commonwealth University for the academic year 2002-2003. It includes information on academic regulations, degree requirements, course offerings, faculty, academic calendar, and tuition and expenses for undergraduate programs

Virginia Commonwealth University Undergraduate Bulletin

Undergraduate bulletin for Virginia Commonwealth University for the academic year 2002-2003. It includes information on academic regulations, degree requirements, course offerings, faculty, academic calendar, and tuition and expenses for undergraduate programs

Virginia Commonwealth University Undergraduate Bulletin

Undergraduate bulletin for Virginia Commonwealth University for the academic year 2001-2002. It includes information on academic regulations, degree requirements, course offerings, faculty, academic calendar, and tuition and expenses for undergraduate programs

Virginia Commonwealth University Undergraduate Bulletin

Undergraduate bulletin for Virginia Commonwealth University for the academic year 2003-2004. It includes information on academic regulations, degree requirements, course offerings, faculty, academic calendar, and tuition and expenses for undergraduate programs