This paper presents an integrated multi-analytical documentation of a bronze vessel discovered in a 2nd century Roman military fort from ancient Dacia. The process involved 3D digitization, X-ray and hyperspectral imaging, and molecular,... more
This paper presents an integrated multi-analytical documentation of a bronze vessel discovered in a 2nd century Roman military fort from ancient Dacia. The process involved 3D digitization, X-ray and hyperspectral imaging, and molecular, elemental, and structural analysis using Fourier Transform infrared spectroscopy, X-ray fluorescence, laser-induced breakdown spectroscopy and X-ray diffraction. The results of the study revealed the composition of the vessel metal and of the interior coating and the state of conservation through metal quality, internal cracks and corrosion compounds mapping. A 3D virtual reconstruction of the original aspect is also proposed based on the digitization and metal characterization results.
In this paper we describe an experience undertaken in the Faculty of Architecture of Technical University of Lisbon, concerning the introduction of a 3D Digitization course in the frame of the PhD doctorate program in Architecture and in... more
In this paper we describe an experience undertaken in the Faculty of Architecture of Technical University of Lisbon, concerning the introduction of a 3D Digitization course in the frame of the PhD doctorate program in Architecture and in the frame of the Master’s programs in Architecture, Urbanism and Design. We start by describing the theoretical and instrumental frameworks proposed. Then we describe and discuss a set of two exercises developed during one semester, giving examples of the work produced by the students. Finally we end with some considerations to be taken into account in future editions of the course.
This paper describes the use of 3D digitization to acquire data and to produce technical documentation for the inventory of historical buildings. The object defined as case study is an ornamented window of the Lisbon’s Metropolitano... more
This paper describes the use of 3D digitization to acquire data and to produce technical documentation for the inventory of historical buildings. The object defined as case study is an ornamented window of the Lisbon’s Metropolitano Social Headquarters, project of the architect Norte Júnior, located in the city of Lisbon. The methodology of the research relies on the comparison of two different approaches: (1) the use of Autodesk 123D Catch software to produce a geometric model and (2) the of the software My 3D Scanner to obtain a point cloud and the MeshLab software to obtain a texturized mesh.
3D digitization best practices; metadata and paradata collection mixing preexisting data and new information; ingestion in Europeana using the 3DICONS tools.
En la escultura contemporánea existen muchas obras que son difícilmente digitalizables en tres dimensiones utilizando procedimientos tanto activos como pasivos. Estos procedimientos plantean dificultades cuando se aplican sobre escultura... more
En la escultura contemporánea existen muchas obras que son difícilmente digitalizables en tres dimensiones utilizando procedimientos tanto activos como pasivos. Estos procedimientos plantean dificultades cuando se aplican sobre escultura construida, realizada a partir de fragmentos, con materiales laminares de poco espesor u objetos con muchas oquedades y solapamientos. Ante la imposibilidad de obtener resultados óptimos con este tipo de obras, se hace necesario utilizar nuevas estrategias que permitan la obtención de un modelo digital. Para ello se propone, ejemplificado en un objeto de estudio, la implementación de técnicas de modelado 3D de precisión. Apoyándonos en la nube de puntos obtenidas mediante sistemas activos o pasivos de digitalización 3D, se genera un modelo virtual utilizando técnicas de modelado con superficies nurbs. El resultado es un modelo 3D útil para procesos digitales de despiece, reconstrucción, así como para la catalogación o la divulgación de la obra. Abriendo la posibilidad del análisis virtual en procesos de conservación y restauración.
