DH2015 - Track 1

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https://diglib.eg.org/handle/10.2312/14458

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Browsing DH2015 - Track 1 by Subject "3D Reconstruction"

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    A Comparison of Digital Modelling Techniques Analyzing a Section of Qhapaq Ñan
    (IEEE, 2015) Retamozo, Saúl; Zvietcovich, Fernando; Arce, Diego; Quintana, Matias; Angeles, Sergio; Castañeda, Benjamin; Aguilar, Rafael; Gabriele Guidi and Roberto Scopigno and Fabio Remondino
    Total Station has been one of the most common acquisition devices for achieving maps through topographic survey. Nowadays, Terrestrial Laser Scanner (TLS) and Photogrammetry are commonly used to generate accurate meshes. In addition, commercial products such as Kinect offer low cost technology to acquire point-cloud information. The present paper aims to measure the accuracy of these digital modelling techniques by employing elevation contour maps, surface deviations and distance measurements. For this purpose, a 450 m sector of the Qhapaq Nan located in Lima-Peru, was selected as a case of study. A camera-enabled drone was used for acquiring pictures to obtain a high-resolution photogrammetric Total Station has been one of the most common acquisition devices for achieving maps through topographic survey. Nowadays, Terrestrial Laser Scanner (TLS) and Photogrammetry are commonly used to generate accurate meshes. In addition, commercial products such as Kinect offer low cost technology to acquire point-cloud information. The present paper aims to measure the accuracy of these digital modelling techniques by employing elevation contour maps, surface deviations and distance measurements. For this purpose, a 450 m sector of the Qhapaq Nan located in Lima-Peru, was selected as a case of study. A camera-enabled drone was used for acquiring pictures to obtain a high-resolution photogrammetric model. Subsequently, a 3D survey of the monument was conducted with a time-of-flight laser scanner. Contour elevation lines where extracted from TLS, Photogrammetry and Total Station models at the same depths in order to determine the precision of photogrammetry and laser scanner reconstructions. In addition, geometrical comparisons were performed among the 3D models above mentioned and the Kinect sensor. The comparison showed that TLS is the most accurate tool for 3D reconstruction. However, Photogrammetry and Kinect provided errors of less than one centimeter in accuracy.
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    Recovering the History of Bergen Belsen Using an Interactive 3D Reconstruction in a Mixed Reality Space: the Role of Pre-knowledge on Memory Recollection
    (IEEE, 2015) Oliva, Laura Serra; Mura, Anna; Betella, Alberto; Martinez, Enrique; Verschure, Paul; Gabriele Guidi and Roberto Scopigno and Fabio Remondino
    The question addressed by our work is twofold: On the one hand we want to contribute to the preservation of the Holocaust cultural heritage using digital technology, on the other hand, we want to investigate the impact of pre-knowledge on context information when this information is acquired in a virtual environment. Specifically, we wanted to investigate the user experience after factual or emotional information prior exposure to a virtual environment showing historical information, in this case related to the Holocaust. We developed a 3D reconstruction of the delousing building of the Bergen Belsen concentration camp and deployed it in an interactive mixed reality space. Here the user was engaged in a guided tour of the delousing building and was exposed to factual information on the configuration of the building and its history through pictures and a narrating voice. The results of our study show that prior knowledge i.e ''emotional vs factual'' affects memory recollection and thus our ability to retain relevant information. The outcome of our study supports the usefulness of digital and interactive technologies as a tool to recover and preserve cultural heritage.