Aplicación de fuentes de luz sobre modelos fotogramétricos para el diagnóstico y restauración virtual de objetos en cera policromada
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2021
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Associação Profissional de Conservadores-Restauradores de Portugal (ARP)
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Abstract
El objetivo de este trabajo es presentar un nuevo enfoque práctico de la fotogrametría digital en la diagnosis artística y la restauración virtual. El estudio se ha aplicado a un modelo anatómico de cera policromada, datado en el siglo XVIII. En el registro fotográfico, se ha utilizado la combinación de fuentes de iluminación (visible y ultravioleta) para obtener modelos 3D que sirven como herramientas de documentación para a la hora de mapear con exactitud el estado de conservación y de proyectar la restauración virtual. Se describen las etapas del proceso fotogramétrico junto con la estrategia de iluminación y la gestión del color empleados para solventar la problemática del registro virtual en superficies de objetos con acabados muy brillantes. Los resultados obtenidos son prometedores puesto que permiten obtener un modelo 3D con un óptimo registro de la morfología de la escultura sobre el que proyectar virtualmente soluciones dentro del modelo de toma de decisiones.
The objective of this work is to present a new practical approach to digital photogrammetry in artistic diagnosis and virtual restoration. The study has been applied to an anatomical model of polychrome wax, dated from the 18th century. In the photographic record, the combination of light sources (visible and ultraviolet) has been used to obtain 3D models that serve as documentation tools to accurately map the state of conservation and to project the virtual restoration. The stages of the photogrammetric process are described along with the lighting strategy and colour management used to solve the problem of virtual registration on surfaces of objects with very bright finishes. The results obtained are promising, because they make it possible to obtain a 3D model with optimal record of the morphology of the sculpture to project virtual solutions within the decision-making model.
The objective of this work is to present a new practical approach to digital photogrammetry in artistic diagnosis and virtual restoration. The study has been applied to an anatomical model of polychrome wax, dated from the 18th century. In the photographic record, the combination of light sources (visible and ultraviolet) has been used to obtain 3D models that serve as documentation tools to accurately map the state of conservation and to project the virtual restoration. The stages of the photogrammetric process are described along with the lighting strategy and colour management used to solve the problem of virtual registration on surfaces of objects with very bright finishes. The results obtained are promising, because they make it possible to obtain a 3D model with optimal record of the morphology of the sculpture to project virtual solutions within the decision-making model.