Tridimensional Reconstruction Applied to Cultural Heritage with the Use of Camera-Equipped UAV and Terrestrial Laser Scanner

Abstract

Abstract:No single sensor can acquire complete information by applying one or several multi-surveys to cultural object reconstruction. For instance, a terrestrial laser scanner (TLS) usually obtains information on building facades, whereas aerial photogrammetry is capable of providing the perspective for building roofs. In this study, a camera-equipped unmanned aerial vehicle system (UAV) and a TLS were used in an integrated design to capture 3D point clouds and thus facilitate the acquisition of whole information on an object of interest for cultural heritage. A camera network is proposed to modify the image-based 3D reconstruction or structure from motion (SfM) method by taking full advantage of the flight control data acquired by the UAV platform. The camera network improves SfM performances in terms of image matching efficiency and the reduction of mismatches. Thus, this camera network modified SfM is employed to process the OPEN ACCESS Remote Sens. 2014, 6 10414 overlapping UAV image sets and to recover the scene geometry. The SfM output covers most information on building roofs, but has sparse resolution. The dense multi-view 3D reconstruction algorithm is then applied to improve in-depth detail. The two groups of point clouds from image reconstruction and TLS scanning are registered from coarse to fine with the use of an iterative method. This methodology has been tested on one historical monument in Fujian Province, China. Results show a final point cloud with complete coverage and in-depth details. Moreover, findings demonstrate that these two platforms, which integrate the scanning principle and image reconstruction methods, can supplement each other in terms of coverage, sensing resolution, and model accuracy to create high-quality 3D recordings and presentations.

Three Dimentional Reconstruction of Large Cultural Heritage Objects Based on Uav Video and TLS Data

“…Hence, for increased speed, the removal of redundant images can make some sense (Alsadik et al, 2013;Alsadik et al, 2015). Furthermore, from our experimental experiences, decreasing the number of matched image pairs also contributes to saving time in image reconstructing process while without in loss the quality of 3D scene geometry (Xu et al, 2014). From image reconstruction point of view, the combination of decreasing both redundant images and matched image pairs are good issues for real-world applications.…”

“…An octocopter named BNU D8-1 (Xu et al, 2014) was employed for aerial video shooting. It worked at an average height of 80 m above the ground with manually control.…”

“…Good examples can be found in literatures, where 3D reconstructions of culture heritage objects were obtained from TLS data and UAV photogrammetry (Remondino, 2011). With the fact that no single sensor can acquire complete information by performing one or several multi-surveys to cultural object reconstruction, some studies have been done by integrating these two platforms for 3D reconstruction of large and complex scenes (Remondino and Rizzi, 2010;Xu et al, 2014). In addition, the rapid development of advanced image-based reconstruction techniques enables to obtain 3D reconstructions from both images and video frames.…”

Digital preservation of cultural and scientific heritage: involving university students to raise awareness of its importance

“…The two last techniques require equipment that is more expensive and need the real existence of the object to be modelled. Often none of these techniques can fully satisfy all the requirements, specially when dealing with large dimension environments, and multiple techniques have to be combined to produce 3D reconstructions (Dylla, Frischer, Muller, Ulmer, & Haegler, 2010;Gabellone, Giannotta, Ferrari, & Dell'aglio, 2013;Lercari, Forte, & Onsurez, 2013;Micoli, Guidi, Angheleddu, & Russo, 2013;Muñumer & Lerma, 2015;Visintini, Siotto, & Menean, 2009;Xu et al, 2014).…”

Structure from motion (SfM) processing of UAV images and combination with terrestrial laser scanning, applied for a 3D-documentation in a hazardous situation

“…Surfaces mainly developing on different planes require either specifically planned photogrammetric flights or ground-based image shooting (Xu et al 2014;Balletti et al 2015;Caroti et al 2015b).…”