From real to… “real”. A review of geomatic and rapid prototyping techniques for solid modelling in cultural heritage field

The documentation and 3D modelling of Cultural Heritage are now mainly based on digital techniques to produce complete, detailed and photorealistic three-dimensional surveys. The integration of various technologies and sensors is the best solution to obtain results with these characteristics. According to the reproduction scale, you need to change the characteristics of the instruments used during acquisition. Reduced or real scale solid models are an effective support for projects involving communication and divulgation: they can be understood without the intermediation of data processing systems, therefore increasing the potential users. Additive Manufacturing (AM) is an expression indicative of technologies used to fabricate physical objects directly from CAD data sources; they are also called three-dimensional printing, solid freeform fabrication or layered manufacturing. The paper analyzes only factors related to the processing that involves the superficial aspect of the solid model; some important aspects useful in other applications, e.g. mechanical behaviour of the used material or the method to realize the internal structure or possible supports of the model, are neglected

Effective 3D digitization of archaeological artifacts for interactive virtual museum

This paper presents a set of results of an on-going research on digital 3D reproduction of medium and small size archaeological artifacts which is intended to support the elaboration of a virtual and interactive exhibition environment, and also to provide a scientific archive of highly accurate models for specialists. After a short illustration of the background project and its finalities, we present the data acquisition through triangulation-based laser scanning and the post-processing methods we used to face the challenge of obtaining a large number of reliable digital copies at reasonable costs and within a short time frame, giving an account of the most recurrent problematic issues of the established work-flow and how they were solved (the careful placing of the artifacts to be digitized so to achieve the best results, the cleaning operations in order to build a coherent single polygon mesh, how to deal with unavoidable missing parts or defected textures in the generated model, etc.)

geomatics for structural assessment and surface diagnostic of ch

Abstract The capacity to rapidly acquire large quantities of spatial data, to geo-reference information on them, to obtain detailed models that allow more and more accurate analyses and simulations, place Geoinformatics at the center of attention in many research areas. Among these, the use of these techniques for the study of existing structures is particularly interesting. Assessing the current stability of a building, monitoring the evolution over time of a failure, preventing the potential causes of damage, simulating the behavior of a building under seismic actions, are just some of the ways in which the geometric properties of a structure, acquired with the most up-to-date automated surveying systems, are used to help validate structural integrity analyse