Extending a Mobile Device With Low-Cost 3d Modeling and Building-Scale Mapping Capabilities, for Application in Architecture and Archaeology

Abstract

ABSTRACT:One of the most challenging problem in architecture is the automated construction of 3D (and 4D) digital models of cultural objects with the aim of implementing open data repositories, scientifically authenticated and responding to well accepted standards of validation, evaluation, preservation, publication, updating and dissemination. The realization of such an ambitious objective requires the adoption of special technological instruments. In this paper we plan to use portable devices (i.e. smartphones, tablets or PDAs eventually extended to wearable ones), extended with a small plug-in, for automatically extracting 3D models of single objects and building-scale mapping of the surrounding environment. At the same time, the device will provide the capability of inserting notes and observations. Where the instrument cannot be directly applied, for example for exploring the top of a complex building, we consider mounting our device, or using equivalent existing equipment, on a drone, in a modular approach for obtaining data de-facto interchangeable. The approach based on the expansion packs has the advantage of anticipating (or even promoting) future extensions of new mobile devices, when the spectrum of possible applications justify the corresponding increased costs. In order to experiment and verify this approach we plan to test it in two specific scenarios of the cultural heritage domain in which such devices seem particularly promising: Strada Nuova in Genoa and Palazzo Ducale in Urbino, both located in Italy.

Fast, low cost and safe methodology for the assessment of the state of conservation of historical buildings from 3D laser scanning: The case study of Santa Maria in Portonovo (Italy)

“…The photographic image superimposed on the 3D point cloud enables better identification of the geometric details of the work, and makes it easier to measure. Coordinates X, Y, Z in space and photorealistic RGB values [9] based on the images acquired at this stage are associated for each point. After being captured, the images were automatically assembled by the internal instrument software used in a mosaic forming 360 • .…”

“…Nowadays, the use of 3D laser scanner and digital imaging seems to be able to overcome these problems [9,10], especially when a higher resolution is needed [11,12]. They also permit to acquire (external) data far from the case study with no direct contact, thus operating in safer conditions.…”

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“…Examples of such research are reported, e.g. by Ancona et al (2015), Kolev et al (2014), Tanskanen et al (2013).…”