3-D Digitization Methodologies for Cultural Artifacts

Author(s):  
K. Lee ◽  
X.W. Xu

The three main methods of digitization can be broadly defined as contact digitization, image-based digitization (photogrammetry), and geometry-based digitization (laser scanning). With the development of the latter two digitization methods, and advanced rendering technologies, virtual displays and museums can now be used widely. (Hung, 2007) Furthermore, recent developments in interactive 3-D computer graphics technology have seen an increased interest in, and use of, 3-D digitization for cultural heritage objects. (Muller-Wittig, Zhu, & Voss, 2007) Technologies for reconstructing or remodeling physical components in 3- D formats are not new in the engineering field, in particular within manufacturing engineering. However, 3-D digitization used for the preservation and archiving of cultural artifacts is relatively recent.

Author(s):  
S. Logothetis ◽  
A. Delinasiou ◽  
E. Stylianidis

We discuss the evolution and state-of-the-art of the use of Building Information Modelling (BIM) in the field of culture heritage documentation. BIM is a hot theme involving different characteristics including principles, technology, even privacy rights for the cultural heritage objects. Modern documentation needs identified the potential of BIM in the recent years. Many architects, archaeologists, conservationists, engineers regard BIM as a disruptive force, changing the way professionals can document and manage a cultural heritage structure. The latest years, there are many developments in the BIM field while the developed technology and methods challenged the cultural heritage community in the documentation framework. In this review article, following a brief historic background for the BIM, we review the recent developments focusing in the cultural heritage documentation perspective.


2021 ◽  
Vol 968 (2) ◽  
pp. 2-10
Author(s):  
H.M. Choker ◽  
M.G. Mustafin

Preservation of cultural heritage is associated with their fixation by performing measurements. They are very effective when we use the terrestrial laser scanning method, as a means of obtaining the most complete and reliable information on the geometry of the object at a particular time. However, the method of laser scanning is not so widely represented in the technical literature, for instance, on Totalstation- or theodolite surveys due to the relatively recent introduction in geodetic practice, especially for the purposes of fixing monuments. There are many questions on application of this technology for the above mentioned aim, they focus on ensuring the required regulatory or its accuracy. The authors discuss a geodetic method for ensuring the precision of laser scanning surveys including the design and estimating the fixed control points’ exactness, as well as the tie ones. The influence of angular and linear measurements over the laser positioning accuracy is shown. The technique is demonstrated, including modeling design schemes and their comparison with actual data. The research results are confined to the world-class cultural heritage site of Baalbek temple complex in Lebanon.


Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3277 ◽  
Author(s):  
Jakub Markiewicz ◽  
Dorota Zawieska

The aim of this article is to present the influence of detector selection for the image-based Terrestrial Laser Scanning (TLS) registration method. The presented results are the extended continuation of investigations presented in the article, ‘The Influence of the Cartographic Transformation of TLS Data on the Quality of the Automatic Registration’. In order to obtain the correct results of the TLS registration process, it is necessary to detect and match the correct tie points, which are evenly distributed across the entire area. Commonly, for TLS data registration manually or semi-manually corresponding points are detected. However, when large, complicated cultural heritage objects are investigated, it is sometimes impossible to place marked control points. The only possibility of resolving this problem is the use of image-based TLS data registration. One of the most important factors that influences the quality and ability to use it correctly, is accurate selection. For this purpose, the authors decided to test three blob detectors ASIFT, SURF, CenSurE, and two point detectors FAST and BRISK. The results indicated that selection depends on two factors: if the time required for data processing is not important, the ASIFT algorithm should be used, which allows for full registration, but if not, a combination of other algorithms with results supervision should be considered.


2010 ◽  
Vol 1 (2) ◽  
pp. 123 ◽  
Author(s):  
José Luis Lerma García ◽  
Miriam Cabrelles López ◽  
Santiago Navarro Tarín ◽  
Sergio Galcerá Ustero

<p>The three-dimensional (3D) documentation by means of laser scanning and photogrammetry eases exhaustive recording, the right lecture of cultural heritage objects and its analysis in order to, on the one hand, adopt appropriate decisions and interventions, on the other hand, move forward the generation of virtual animated replicas of great value and smooth multimedia dissemination. The present paper tackles the different stages of graphic documentation and visualization undertaken in the Parpalló Cave (Cova del Parpalló), Gandia, Valencia. Besides traditional surveying documentation that is based on planimetric and altimetric maps, this paper presents the plotting and animated visualization of the Palaeolithic set not only making use of lights and shadows but also from photorealistic textured 3D models.</p>


Water ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 784
Author(s):  
Ionut Cristi Nicu ◽  
Lena Rubensdotter ◽  
Knut Stalsberg ◽  
Erich Nau

Strong cultural heritage management relies on a thorough evaluation of the threats faced by heritage sites, both in the present and in the future. In this study, we analysed the changes in the position of Hiorthhamn shoreline (Svalbard), which is affecting coastal cultural heritage sites, for a period of 93 years (1927–2020). Shoreline changes were mapped by using maps, ortophotos, drone images, terrestrial laser scanning (TLS), and topographic surveys. Also, TLS was used to 3D document the endangered coastal cultural heritage sites. Detailed sedimentological and morphological mapping was made in the field and from the newly acquired drone images in order to understand shoreline-landscape interaction and to depict changes occurring from 2019 to 2020. Short-term (2019–2020) and long-term (1927–2020) shoreline erosion/accretion was made with the help of the Digital Shoreline Analysis System (DSAS) and prompted a subdivision of three sectors, based on change pattern. Compared to a previous long-term analysis (1927–2019), this year’s average erosion rate analysis (expressed by the EPR parameter) for the 93-year period is −0.14 m/yr. This shift in mean development is due to a newly formed spit-bar in Sector 2. Referring strictly to Sector 1, where the protected cultural heritage objects are located, the erosion rate increased from the previous analysis of –0.76 m/yr to −0.77 m/yr. The shoreline forecast analysis highlights that half of the protected cultural heritage objects will likely disappear over the next decade and almost all the cultural heritage objects analysed in this study will disappear in roughly two decades. This shows the great danger the Arctic’s cultural heritage sites is in if no mitigation measures are undertaken by the local authorities.


2010 ◽  
Vol 4 (1-2) ◽  
pp. 95-109
Author(s):  
Orla Murphy

Laser scanning of stone sculpture creates accurate digital models that may be accessed and interpreted by a wide range of end users at many levels of education and experience. This article explores that activity by focusing on the process of recording a damaged early medieval inscribed high cross shaft at Toureen Peacaun, Co. Tipperary, Ireland. Revisualising the monument is only one aspect of the scholarly process. Renewed interpretations of cultural heritage objects in digital media provide many answers but also stimulate further challenges for humanities computing, notably, how to address the non-machine readable elements of cultural heritage data.


2020 ◽  
Vol 6 (1) ◽  
pp. 80-86
Author(s):  
Anastasiya V. Volovodova ◽  
Ekaterina N. Kulik

The article discusses the application of mobile laser scanning data for formation of spatial base for monitoring of cultural heritage objects. Mobile laser scanning technology has been characterized as a modern high-performance method of survey. The technology of processing in Gexсel Reconstructor software is presented, the main results of the processing are demonstrated. The advantages and perspectives of applications of mobile laser scanning data obtained by the Heron Lite Color for three-dimensional modeling of indoor cultural heritage objects are noted.


Author(s):  
S. Tanaka ◽  
K. Hasegawa ◽  
N. Okamoto ◽  
R. Umegaki ◽  
S. Wang ◽  
...  

We propose a method for the precise 3D see-through imaging, or transparent visualization, of the large-scale and complex point clouds acquired via the laser scanning of 3D cultural heritage objects. Our method is based on a stochastic algorithm and directly uses the 3D points, which are acquired using a laser scanner, as the rendering primitives. This method achieves the correct depth feel without requiring depth sorting of the rendering primitives along the line of sight. Eliminating this need allows us to avoid long computation times when creating natural and precise 3D see-through views of laser-scanned cultural heritage objects. The opacity of each laser-scanned object is also flexibly controllable. For a laser-scanned point cloud consisting of more than 10&lt;sup&gt;7&lt;/sup&gt; or 10&lt;sup&gt;8&lt;/sup&gt; 3D points, the pre-processing requires only a few minutes, and the rendering can be executed at interactive frame rates. Our method enables the creation of cumulative 3D see-through images of time-series laser-scanned data. It also offers the possibility of fused visualization for observing a laser-scanned object behind a transparent high-quality photographic image placed in the 3D scene. We demonstrate the effectiveness of our method by applying it to festival floats of high cultural value. These festival floats have complex outer and inner 3D structures and are suitable for see-through imaging.


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