Abstract
This paper investigates the synergetic use of unmanned aerial vehicle (UAV) and terrestrial laser scanner (TLS) in 3D reconstruction of cultural heritage objects. Rather than capturing still images, the UAV that equips a consumer digital camera is used to collect dynamic videos to overcome its limited endurance capacity. Then, a set of 3D point-cloud is generated from video image sequences using the automated structure-from-motion (SfM) and patch-based multi-view stereo (PMVS) methods. The TLS is used to collect the information that beyond the reachability of UAV imaging e.g., partial building facades. A coarse to fine method is introduced to integrate the two sets of point clouds UAV image-reconstruction and TLS scanning for completed 3D reconstruction. For increased reliability, a variant of ICP algorithm is introduced using local terrain invariant regions in the combined designation. The experimental study is conducted in the Tulou culture heritage building in Fujian province, China, which is focused on one of the TuLou clusters built several hundred years ago. Results show a digital 3D model of the Tulou cluster with complete coverage and textural information. This paper demonstrates the usability of the proposed method for efficient 3D reconstruction of heritage object based on UAV video and TLS data.
Highlights
This paper provides a pipeline for the design of efficient 3D reconstruction of culture heritage objects based on unmanned aerial vehicle (UAV) video and terrestrial laser scanner (TLS) data
The digitization was out the scope of this paper, the experimental results demonstrated that the integrated points from UAV image reconstruction and TLS measurement met the demand of digitization and texturing
This paper gave a framework for the design of 3D reconstruction of cultural heritage objects
Summary
2. STUDY AREA AND DATA ACQUISITION 2.1 Study Area. More than 3000 Tulou clusters built several hundred years ago are located in the study area, which were viewed as great cultural heritage. We focused on the Zhencheng TuLou (Figure 1), that built in 1912, which was considered as the best preserved and most typical one. It was well designed with a combination of two concentric rings in the center and two allocated units aside. It contained four floors and covered the area of around 5000 m2.
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