2025 Volume 81 Issue 22 Article ID: 24-22008
This paper presents a hybrid MR (Mixed Reality) visualization system that enables seamless and highly accurate superimposition in any outdoor environment by selecting two types of superimposition methods: location-based and marker-based. The system uses HoloLens 2 as the MR device, and performs location-based positioning in an open-sky environment with good GNSS (Global Navigation Satellite System) receiver reception, and automatically switches to marker-based positioning in a non-open-sky environment with poor reception. An opening model is also introduced to visualize underwater structures naturally and quantitatively. To verify its validity and effectiveness, the present MR visualization system is applied to the visualization of the base of piers of a road bridge.