Anna Bentkowska-Kafel

“I bought a piece of Roman furniture on the Internet. It's quite good but low on polygons.”—Digital Visualization of Cultural Heritage and its Scholarly Value in Art History

This paper looks at select practices in computer-based visualization of cultural heritage and raises questions about evaluation criteria for digital scholarship in this area of arts and humanities research. The premise here is the acknowledgment of the complexity of computer-based visualization and significance of earlier research. Scholarly visualization is considered as a mode of inquiry and form of communication. The process of visualization involves manipulation. Scholarly visualization of heritage may only be recognized as valid and ethical—it is argued—when accompanied by paradata, i.e., the documentation of the evaluative, analytical, deductive, interpretative, and creative decisions made in the course of research.

Colour and Space in Cultural Heritage: Key Questions in 3D Optical Documentation of Material Culture for Conservation, Study and Preservation

The paper introduces some key interdisciplinary questions concerning the development of optical measuring techniques and electronic imaging applied to documentation and presentation of artefacts, as identified through the work of Colour and Space in Cultural Heritage (www.COSCH.info), a trans-domain European Action (TD1201) in the area of Materials, Physics and Nanosciences (MPNS) supported, since 2013, by the European Cooperation in Science and Technology http://www.cost.eu/domains_actions/mpns/Actions/ TD1201. Some 125 international researchers and professionals participate in COSCH activities which have been organised around six main subjects: (1) spectral object documentation; (2) spatial object documentation; (3) algorithms and procedures; (4) analysis and restoration of cultural heritage surfaces and objects; (5) visualisation of cultural heritage objects and its dissemination; and (6) the semantic development of the COSCH Knowledge Representation.

Colour and Space in Cultural Heritage: Interdisciplinary Approaches to Documentation of Material Culture

Colour and Space in Cultural Heritage (www.COSCH.info) is a transdomain European Action (TD1201) in the area of Materials, Physics and Nanosciences (MPNS). The Action runs from 2013 to 2017 and benefits from the support of the European Cooperation in Science and Technology http://www.cost.eu/domains_actions/mpns/Actions/TD1201. The Authors are active participants of the COSCH network. They represent different disciplines involved in documentation and conservation of material cultural heritage. COSCH aims to enhance applications of optical measuring techniques and electronic imaging in this area. The paper outlines scientific, theoretical and practical solutions promoted by COSCH. COSCH activities have been organised around six main subjects: (1) spectral object documentation; (2) spatial object documentation; (3) algorithms and procedures; (4) analysis and restoration of cultural heritage surfaces and objects; (5) visualisation of cultural heritage objects and its dissemination; and (6) the semantic devel...

Colour and space in cultural heritage: Key questions in 3D optical documentation of material culture for conservation, study and preservation

This paper presents an automatic methodology capable of registering non-overlapping laser scans based on a bundle block adjustment for the orientation estimation of synthetic images generated from the 3D data and camera images using a Structure-from-Motion (SfM) method. Adding camera images to the registration of the generated images can improve the block geometry. The SfM process provides accurate image orientations and sparse point clouds, initially in an arbitrary model space. This enables an implicit determination of the 3D-to-3D correspondences between the sparse points and the laser data then, the Helmert transformation is introduced and its parameters are computed. This results in registering the non-overlapping scans, since the relative orientations between the generated images are determined at the SfM step and transformed to the absolute coordinate system directly. The proposed approach was tested on real case studies and experimental results are shown to demonstrate the effectiveness of the presented method.

Colour and space in cultural heritage

This paper presents an automatic methodology capable of registering non-overlapping laser scans based on a bundle block adjustment for the orientation estimation of synthetic images generated from the 3D data and camera images using a Structure-from-Motion (SfM) method. Adding camera images to the registration of the generated images can improve the block geometry. The SfM process provides accurate image orientations and sparse point clouds, initially in an arbitrary model space. This enables an implicit determination of the 3D-to-3D correspondences between the sparse points and the laser data then, the Helmert transformation is introduced and its parameters are computed. This results in registering the non-overlapping scans, since the relative orientations between the generated images are determined at the SfM step and transformed to the absolute coordinate system directly. The proposed approach was tested on real case studies and experimental results are shown to demonstrate the effectiveness of the presented method.