Methodology of Reverse Engineering Implemented in the Process of Digitalization and Conservation of Wooden Carvings (original) (raw)
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Reverse Engineering and 3D Modelling for Digital Documentation of Maritime Heritage
ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2011
Since 2003, Barcelona charter has highlighted the importance of digital recording of historic ships and maritime heritage in general. Despite this has been stressed with emphasis, three dimensional modelling of maritime cultural heritage is still not usual as for archaeology and architecture. Three-dimensional modelling in the maritime heritage needs particular requirements. Objects to be recorded range from small replicas in maritime museums up to full-scale vessels still in operation. High geometric accuracy, photorealism of final model and faithful rendering of salient details are usually needed, together with the classical requisites characterising the 3D modelling-from-reality process, i.e. automation, low cost, reliability and flexibility of the modelling technique. In this paper, a hybrid multi-technique approach is proposed for maritime heritage preservation and, as case study, the 3D modelling of a 3-meter-long scale model of a historic warship, the "Indomito", is presented. The survey is placed in a wider project aiming to realize the virtual maritime museum of Parthenope University of Naples, for making it available to a wider public and also preserving its cultural heritage. Preliminary results are presented and discussed, highlighting relevant aspects that emerged during the experiment.
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
Applications of 3dscanning and digital manufacturing established a new understanding of the architectural space, making it possible to capture it at a specific time. The possibility to get them closer ease the recreation of a physical object. In the present work, different methodologies and post-production techniques are presented, starting from scans, and working computationally to prepare the models for additive manufacturing. To describe this workflow, two architectural examples are used: a historic façade of the XVI Century and the recent archaeological project, from II Century BC. The primary objective has been to get closer the world of 3D scanning and digital manufacturing. It has been focused on its application for the preservation of fragile cultural elements, not only in its conservation from natural disasters or human conflicts but also to study the possibility of replicating the elements and making them accessible in a digital way.
3D Scanning and Computer Simulation of Archaeological Artefacts
2012
The main objective of our research is to understand possible relationships between the form and function(s) of archaeological artefacts, by developing a new methodology based on Reverse Engineering processes – i.e. 3D scan, quantitative data analysis and Artificial Intelligence techniques, in particular computer simulation. In addition, we intend to provide new data, as well as possible explanatory uses of archaeological heritage according to what people want to learn about social activities and working processes in the past, by simulating the potentialities of such actions and visualizing a virtual reconstruction of their material consequences. Our research project focuses on the Neolithic lakeside site of La Draga (Banyoles, Catalonia). In this scope, this presentation aims to provide a clear overview and description of the main guidelines used to capture and process 3D digital data of several wooden artefacts of this archaeological site, as well as to present a technology able to visualize how prehistoric artefacts were used in the past. Furthermore, we aim to reuse and to repurpose these 3D digital models in conservation monitoring, digital archive and other future researches.
Procedia CIRP
In recent years, reverse engineering has achieved a relevant role in the cultural heritage field. The availability of 3D digital models of artefacts opens the door to a new era of cultural heritage: virtual museum creation, artefact cataloguing, conservation, planning and simulation of restoration, monitoring of artefacts subjected to environmental degradation, virtual reconstruction of damaged or missing parts, reproduction of replicas, etc. In this paper, two different non-contact reverse engineering scanning systems were utilized for 3D data acquisition of a cultural heritage artefact. The digital data acquisition and processing procedures of the scanned geometry have been illustrated and compared to evaluate the performance of both systems in terms of data acquisition time, processing time, reconstruction precision and final model quality. Finally, additive manufacturing technologies were applied to reconstruct a down scaled copy of the artefact.
Computer-Aided Design and Applications
This paper describes an innovative methodology which automatically creates a 2D-axisymmetric finite element (FE) model of a quasi-axisymmetric component from its 3D CAD model. The process has been implemented as a script and uses the API to a commercial FE package. The calculation of a volume shape coefficients to be applied in the non-axisymmetric regions of the FE model, to account for the fact the region is not fully axisymmetric, is also described. In the paper, the methodology is demonstrated for a rotating blade of tapered profile analyzing and comparing both stresses and displacement. Excellent results are shown.
3D laser scanning and digital restoration of an archaeological find
MATEC Web of Conferences, 2018
The current paper demonstrates the digital recreation and 3D printing of a missing fragment of an ancient ceramic pottery following digitization using a three dimensional laser scanning. The resulting pointcloud of the laser scans was treated with a series of advanced software for the creation of surfaces and ultimately for a digital model. An analytical methodology is presented revealing the step by step approach, which is an innovative way of recreating a missing fragment. Such approach aims to demonstrate the level of contribution that the ever evolving computer based technologies and 3D printing could bring to cultural heritage. The reverse engineering method presented for the reconstruction of a ceramic pottery, which is a part of the larger field of digital archaeology, is believed to benefit a variety of interested parties including 3D CAD users and designers, archaeologists and museum curators.
ENGINEERING CAD TOOLS IN DIGITAL ARCHAEOLOGY
2014
This paper presents an original approach in the virtual reconstruction of destroyed ancient monument types which have no similarities to other standing monuments, or documentation about the design of these constructions. In this case the virtual reconstruction is a challenging act, which can be done using a large variety of designs. These designs must be validated not just from an archaeological or historical, but also from an engineering point of view, to create valid virtual models from the construction's point of view. For this reason the authors chose to create the virtual reconstructions in Computer Aided Design (CAD) environment, in the detriment of design software's, because it's easier to create the virtual models and to do the simulations in the same software environment. Also in this paper are presented different reconstruction methods (photogrammetry using profile drawings and knowledge database creation) that can be achieved with the use of CAD software. The authors used different levels of details (LOD), which can be helpful in the validation process, where can be observed the structure of the monuments very detailed, and for renderings for dissemination. The case study was conducted on a destroyed Dacian watch tower by an interdiscipli-nary team composed of archaeologists, historians and engineers. The reconstruction of the watch tower was carried out in CATIA V5, and was disseminated through a video render, an virtual reality website and was imported into an augmented reality application. KEYWORDS: 3D reconstruction, 3D model, ancient destroyed monument. 84 ZSOLT BUNA et al ©
Use of 3D-scanning and reverse engineering by manufacturing of complex shapes
Applications of Reverse Engineering to speeding up a product realization process have gained momentum in recent years. The aim of this paper is to firstly provide a brief overview of Reverse Engineering technology and the reasons for its development. Furthermore is presented Renishaw Cyclone 2 scanning device with a probe head, which was used for digitizing a real model of a face. Digitized model with assistance of CAD/CAMtechnique had been applied for making a real copy of the face in another material. On the basis of the special computer software the whole procedure from a digitized model to the real copy of the face was verified in the last section.