Distributed collaborative inspections through smart infrastructure metaverse

We propose a real-time distributed collaborative system where on- and off -site inspectors perform synchronous structural inspections; called Smart Infrastructure Metaverse . Mixed Reality (MR) headsets are equipped with a holographic display that allows on -site inspectors to visualize digitized information overlaid on the structure. On the other hand, Virtual Reality (VR) headsets allow remote inspectors to visualize and interact with a prebuilt 3D point cloud map. The MR inspectors execute inspection tasks such as adding annotations or taking measurements via MR interfaces, while the VR inspectors also perform the same tasks in a virtual environment, while the scene of the structure is viewed through 360 degrees panoramic images aligned with the pre -built map using a proposed multi -shot localization algorithm. An experimental study has demonstrated the feasibility of SIM on a railroad bridge where two on -site MR inspectors and one remote VR inspector perform a visual inspection.