Photogrammetry and augmented reality for cultural heritage applications

Abstract

Virtual modelling and 3D reconstruction are common tools used in the field of cultural heritage to recreate, analyse and visualise large objects (for example, archaeological sites and architectural buildings) and small objects such as sculptures, ceramic tiles or silver, marble and wooden artefacts. At present, it is possible to apply different technologies to achieve accurate photo-realistic 3D models. On the one hand, the precise modelling of existing 3D data is usually difficult and expensive as ''reality'' is complex per se; the more complex the object, the more complex the model. On the other hand, models are often achieved with the purpose of visualising the past state of monuments that nowadays are no longer fully conserved. In this sense, ''augmented reality'' (AR) technology can play an important role in cultural heritage. First, it permits the simultaneous viewing of both virtual and real 3D data. Second, the modelling of the entire object is no longer necessary. Third, it is possible to have full ''immersion'' of the viewer. This paper overviews the new technology of AR, as used in the world of cultural heritage to display past (now partially or totally lost) and present scenes together. It goes on to describe some practical experience of applying AR to the re-creation of two features, a Baroque vault and a Renaissance reredos, formerly present above the high altar of Valencia Cathedral in Spain. Augmented Reality Technology Definition and BenefitsThe terms 3D models and virtual reality (VR) are well known. In a virtual environment senses, such as sight, hearing and touch, are controlled by a computer, while actions influence the stimuli produced. In contrast to traditional VR systems, in AR the real environment is not completely suppressed, playing instead an important role (Bimber and Raskar, 2005). Its basic concept is to place computer-generated multimedia into the user's perception (usually field of The Photogrammetric Record

Reconstrucción virtual y visualización 3d del yacimiento arqueológico Castellet de Bernabé (Lliria, España)

“…We propose this as future work for the site. Some examples of AR-based applications for CH can be found in (Portalés, Lerma, & Pérez, 2009;Portalés, Lerma, & Navarro, 2010).…”

123DMOAI: Realidade Aumentada a partir de fotogrametria digital

“…A execução desses procedimentos com precisão, por outro lado, é difícil, dispendiosa e proporcional à complexidade do objeto (Portales, Lerma & Pérez, 2009). Essas limitações têm sido minoradas por avanços no campo das ciências da computação, que gradativamente subsidiaram a evolução e aplicação de tecnologias como a Fotogrametria Digital -cuja ênfase está na criação de modelos virtuais de objetos por meio do uso de fotos digitais como fonte primária de dados (Brito & Coelho, 2002) -e a Realidade Aumentada (RA) -cuja ênfase está na visualização e interação em tempo real desses modelos com o ambiente físico (Schnabel, 2009).…”

Overview of the treatment of historical industrial heritage in engineering graphics

“…There are many publications which give a wide panorama of the application of augmented reality to virtual heritage (Noh et al, 2009) and even of the combination of photogrammetric techniques with augmented reality in the field of cultural heritage (Portales et al, 2009). It is useful here to give a brief summary of some of their characteristics.…”