<p><strong>Abstract.</strong> The present work is suggested as a contribution to the debate on Reverse Modeling (RM) topic in the Cultural Heritage field. It wants to test the methodology, the limits and the bottlenecks of the RM pipeline in the architectural field, with particular attention to the geometric shapes reading and interpretation. The mathematical reconstruction of architectural models represents an overlaid result of anthropic and natural transformations framed inside a complex process of shape simplification and surface generation. This pipeline must be supported by a careful Heritage reading by means of architecture rules, both preserving the actual shape and the original intent of the building designer. The integration of these last two aspects make the process of RM applied to CH extremely complex. It involves a cognitive activity aimed at choosing on the one hand the best 3D survey technique to obtain reliable 3D data, on the other hand reaching a suitable architectural knowledge for achieving a plausible modeling result. The research presented describes a RM process applied to an ecclesiastical architecture, highlighting some key passages: an integrated survey approach to extract geometrical information, data analysis and generation of a mathematical 3D model, reliable from both a formal and cultural point of view.</p>
This contribution studies the ways in which Augmented Reality (AR) can communicate and disseminate knowledge about our cultural heritage in general and, in particular, Architectural Perspectives (AP). The focus is to increase our knowledge and understanding of perspective technique and how the latter deals with the unique mix between the real architectural environment and an illusory space, in this case the decorations of the presbytery and apse of the Church of St. Ignatius in Rome. The specific objective of the study is the possibility to use the Pozzo' s treatise to "augment" its fruition, accompanied by a virtual visit in order to gather more in-depth information about the perspective construction that creates the effect of spatial expansion thanks to this expedient. This decoration is in fact one of the rare cases of a perspective representation of a pictorial project, in turn also a perspective designed by Pozzo; this design is the "activation" element of an AR experience that immediately illustrates the perspective bravura of its creator.
Le tarsie lignee prospettiche realizzate durante il Rinascimento offrono un variegato panorama di soggetti rappresentati in esse. Questi soggetti vanno dalla natura morta e solidi geometrici alla raffigurazione di statue o figure allegoriche poste all'interno, generalmente, di nicchie sferiche o ancora viste di scorci urbani e paesaggistici. Lo studio di queste opere ha sollecitato gli studiosi nel cercare di interpretare le finalità di questi magisteri, così le più accreditate tesi le spiegano come puri esercizi geometrici-prospettici, oppure come esigenze volte a comunicare visioni di brani di città reali o immaginari o ancora come esempi di scenografia teatrale. Sono proprio quest'ultime, quelle tarsie che presentano, nell'immagine formata dall'accostamento delle loro tessere, un impianto prospettico riconducibile alle scene teatrali ad essere state scelte, in questo contributo, per essere studiate. Due sono stati i livelli di indagine: uno dedicato alla lettura critica dell'immagine bidimensionale raffigurata in questi intarsi confrontata con i disegni di scenografie teatrali e un secondo destinato ad analizzare, attraverso la prospettiva inversa, lo spazio tridimensionale rappresentato in queste opere. Come caso studio, per effettuare queste indagini, sono state scelte le tarsie presenti nella Basilica di San Domenico a Bologna realizzate da Fra Damiano Zambelli tra il 1528 e il 1549, in particolare è stata selezionata una tra queste: quella collocata nel dossale del coro.Parole chiave tarsie lignee, coro di San Domenico, scena teatrale, prospettiva solida, immaginazione.
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