Unwrapping Highly-Detailed 3d Meshes of Rotationally Symmetric Man-Made Objects

Rieck, Bastian; Mara, Hubert; Krömker, Susanne

doi:10.5194/isprsannals-ii-5-w1-259-2013

Cited by 10 publications

(7 citation statements)

References 13 publications

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“…Additionally to the images of the column shown in this article, it is possible to apply methods such as the "umbrella transformation", which, e.g. allows for unwrapping the rotationally symmetric parts of the column for a better analysis of its morphology as described in Rieck, Mara, & Krömker (2013).…”

Section: Multimodal and Synesthetic Documentationmentioning

confidence: 99%

Authenticity through VR-based documentation of cultural heritage. A theoretical approach based on conservation and documentation practices

Morcillo

Schaaf

Schneider

et al. 2017

Virtual archaeol. rev.

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Abstract:The visualization of 3D reconstructed artifacts often requires significant computing resources. The implementation of an object in a virtual reality (VR) application even necessitates the reduction of the polygonal mesh. Consequently, the communication and dissemination of "authentic" 3D reconstructions via immersive VR technologies has been a nearly impossible feat for many researchers. However, is the issue really computing resources, or is it rather the notion of authenticity in an "auratic" sense, i.e., an excessive focus on physical evidence and survey data? In the present paper, we will discuss the authenticity requirements for virtual archaeology as set by the Seville Principles (2011), and we will analyze some limitations related to the current approaches. Furthermore, we will propose a pluralistic notion based on the contextualization of 3D objects in VR environments with synesthetic (i.e. multisensory) information. This new notion of authenticity relies on conservation meanings rather than physical features. In line with this approach, two case studies will be commented: the multimodal 3D-documentation of the Jupiter Column (2 AD) in Ladenburg, and the VRbased re-enactment of a modern work of art, the audio-kinetic sculpture Kaleidophonic Dog (1967) by Stephan von Huene. These two projects provide valuable data for a revision of the notion of authenticity in both virtual archaeology and art conservation.Key words: virtual reality (VR), virtual archaeology, kaleidophonic dog, Jupiter column, synesthetic documentation, progressive authenticities Resumen:La visualización de artefactos reconstruidos en 3D requiere a menudo demasiados recursos computacionales. La implementación en una aplicación de realidad virtual (RV) requiere incluso la reducción de la red poligonal del objeto. Consecuentemente, la comunicación y la divulgación de reconstrucciones 3D "auténticas" representa todavía una tarea casi imposible para muchos investigadores. ¿Pero se trata realmente solo de una cuestión de computación, o tiene algo que ver con una noción de autenticidad en un sentido "aurático", es decir, con un enfoque excesivo sobre pruebas materiales y datos mensurables? En este artículo discutimos los requisitos de autenticidad para la arqueología virtual tal y como se formulan en los "Principios de Sevilla" (2011) y analizamos algunas limitaciones de los enfoques actuales. Proponemos, además, una noción pluralista basada en la contextualización de objetos 3D en entornos de RV con información sinestésica (es decir, multisensorial). Esta nueva noción de autenticidad se basa más en la conservación de significados que en la conservación de características físicas. En línea con esta propuesta teórica, se comentarán dos casos de estudio: la documentación multimodal 3D de la Columna de Júpiter de Ladenburg (II d.C.) y la recreación en RV de una obra de arte moderno, la escultura audio-cinética Kaleidophonic Dog (1967) de Stephan von Huene. Estos dos proyectos ofrecen experiencias valiosas para una revisión de la noción de...

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Section: Multimodal and Synesthetic Documentationmentioning

confidence: 99%

Authenticity through VR-based documentation of cultural heritage. A theoretical approach based on conservation and documentation practices

Morcillo

Schaaf

Schneider

et al. 2017

Virtual archaeol. rev.

View full text Add to dashboard Cite

show abstract

“…Figure 1 displays the schematic diagram of the proposed algorithm, which consists of three steps. First, the CT surface data of the patient’s head are transformed into a 2D image using spherical unwrapping, since the head’s surface data are similar to a sphere [ 28 ]. Similarly, the surface measurement data obtained with the sensor are also converted to a 2D image using spherical unwrapping and the mean radius computed from the CT surface data.…”

Section: Proposed Patient-to-ct Registration Methodsmentioning

confidence: 99%

Robust H-K Curvature Map Matching for Patient-to-CT Registration in Neurosurgical Navigation Systems

Kwon

Kim

2023

Sensors

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Image-to-patient registration is a coordinate system matching process between real patients and medical images to actively utilize medical images such as computed tomography (CT) during surgery. This paper mainly deals with a markerless method utilizing scan data of patients and 3D data from CT images. The 3D surface data of the patient are registered to CT data using computer-based optimization methods such as iterative closest point (ICP) algorithms. However, if a proper initial location is not set up, the conventional ICP algorithm has the disadvantages that it takes a long converging time and also suffers from the local minimum problem during the process. We propose an automatic and robust 3D data registration method that can accurately find a proper initial location for the ICP algorithm using curvature matching. The proposed method finds and extracts the matching area for 3D registration by converting 3D CT data and 3D scan data to 2D curvature images and by performing curvature matching between them. Curvature features have characteristics that are robust to translation, rotation, and even some deformation. The proposed image-to-patient registration is implemented with the precise 3D registration of the extracted partial 3D CT data and the patient’s scan data using the ICP algorithm.

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“…Rieck et al [7] provided an in-depth study of unfolding methodologies for high-resolution 3D meshes of objects with rotation symmetry. Previous photogrammetry works used cylinders for the development of 3D surfaces having a precise analytical representation [17].…”

Section: Geometry Pseudo-developmentmentioning

confidence: 99%

“…Developable surfaces can be "unfolded" on a plane without any deformation. This operation is bijective and can be reversed with no loss of accuracy [7].…”

Section: Introductionmentioning

confidence: 99%

A Methodology for Planar Representation of Frescoed Oval Domes: Formulation and Testing on Pisa Cathedral

Piemonte

Crepaldi

Zaragoza

et al. 2018

IJGI

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This paper presents an original methodology for planar development of a frescoed dome with an oval plan. Input data include a rigorous geometric survey, performed with a laser scanner, and a photogrammetry campaign, which associates a high-quality photographic texture to the 3D model. Therefore, the main topics include the development of geometry and, contextually, of the associated textures. In order to overcome the inability to directly develop the surface, an orthographic azimuthal projection is used. Starting from a prerequisite study of building methodology, the dome is divided into sectors and bands, each linked with the maximum acceptable deformations and the actual geometric discontinuities detectable by the analysis of Gaussian curvature. Upon definition of the development model, a custom automation script has been devised for geometry projection. This effectively generates a (u,v) map, associated to the model, which is used for model texturing and provides the planar development of the fresco.

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Unwrapping Highly-Detailed 3d Meshes of Rotationally Symmetric Man-Made Objects

Cited by 10 publications

References 13 publications

Authenticity through VR-based documentation of cultural heritage. A theoretical approach based on conservation and documentation practices

Authenticity through VR-based documentation of cultural heritage. A theoretical approach based on conservation and documentation practices

Robust H-K Curvature Map Matching for Patient-to-CT Registration in Neurosurgical Navigation Systems

A Methodology for Planar Representation of Frescoed Oval Domes: Formulation and Testing on Pisa Cathedral

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