Abstract:In the heritage field the demand for fast and efficient 3D digitization technologies for historic remains is increasing. Besides, 3D digitization has proved to be a promising approach to enable precise reconstructions of objects. Yet, unlike the digital acquisition of cultural goods in 2D widely used today, 3D digitization often still requires a significant investment of time and money. To make it more widely available to heritage institutions, the Competence Center for Cultural Heritage Digitization at the Fraunhofer Institute for Computer Graphics Research IGD has developed CultLab3D, the world's first fully automatic 3D mass digitization facility for collections of three-dimensional objects. CultLab3D is specifically designed to automate the entire 3D digitization process thus allowing users to scan and archive objects on a large-scale. Moreover, scanning and lighting technologies are combined to capture the exact geometry, texture, and optical material properties of artefacts to produce highly accurate photo-realistic representations. The unique setup allows shortening the time needed for digitization to several minutes per artefact instead of hours, as required by conventional 3D scanning methods.Key words: fast and economic 3D digitization, cultural heritage, documentation method, technological innovation, industrialization, automation Resumen:La demanda de tecnologías rápidas y eficientes en el área de digitalización en tercera dimensión para el legado cultural, se encuentra en constante crecimiento. La digitalización en tercera dimensión ha mostrado ser una aproximación prometedora que garantiza una precisa reconstrucción de objetos. Sin embargo, en comparación con la adquisición de objetos culturales en 2D, ampliamente utilizados en la actualidad, la digitalización en tercera dimensión aún requiere de una inversión significativa de tiempo y dinero. Para facilitar su acceso a instituciones enfocadas a salvaguardar el legado cultural, el Centro de Competencia para la Digitalización del Legado Cultural (Competence Center for Cultural Heritage Digitization) del Instituto Fraunhofer, Computer Graphics Research IGD, desarrolló CultLab3D. CultLab3D es la primera instancia a nivel mundial que cuenta con un sistema totalmente automatizado para la digitalización masiva de colecciones de objetos tridimensionales. CultLab3D se diseñó específicamente para automatizar los procesos de digitalización en tercera dimension, permitendo escanear y archivar objetos a larga escala. Además, tecnologías de escaneado e iluminación han sido igualmente combinadas para la captura de geometrías exactas, textura y propiedades ópticas del material que constituyen los artefactos en cuestión, con el objetivo de producir representaciones fotorealísticas altamente precisas. Esta construcción única permite la reducción del tiempo requerido por métodos convencionales para la digitalización en tercera dimensión, siendo necesario solamente algunos minutos en lugar de varias horas.Palabras clave: digitalización 3D rápida y eficiente,...
The World Heritage Convention (WHC), as the premier charter for heritage protection, has long adopted sustainability as a core principle. With today’s understanding of heritage management as an important driver of economic growth, social capital and environmental protection, its reconciliation with sustainable practices is inevitable. Fifty years on, the WHC faces new challenges concerning promoting and supporting sustainable development. With the broad adoption of SDGs, heritage actors working under the WHC framework frequently encounter conflicting objectives. While in theory, the social, ecological and economic dimensions of sustainable development can be reconciled, in practice, this often requires finding viable and balanced trade-offs. The growing awareness for climate change in the last ten years results in the need to reprioritise the different dimensions and can lead to hard choices that have been framed as dilemma situations. This paper takes a closer look at those dilemma situations and discusses how the WHC can help tackle these and make the right decisions in the face of complex sustainability choices.
One important term in the diffusion equation applied to image processing is the conduction coefficient. It could be a real or complex function, depending on the chosen diffusion processes. A modification in the form of the application of filter convolution to the real-value conduction coefficient has been recommended for the improvement of the signal-to-noise ratio and the speed by which the diffusion is performed. In this study, the developments of the approximately circularly symmetric two-dimensional Lagrange filter and the Teager operator are presented. They are proposed here for the modification of the complex-value conduction coefficient for the improvement of the image diffusion process. Performance of the proposed modifications is evaluated through simulation and the use of three metrics. Experimental results suggest the validity and applicability of the proposed modifications.
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