Application of Structure-From-Motion Multi-view Stereo (SfM-MVS) Photogrammetry in First Response Inspection of Distressed Buildings

The digital transformation of built environments into 3D computer models via photogrammetry for inspection, documentation, or remote mapping has evolved over the last few decades. Today, the appropriateness of different cameras and laser scanners gives even more opportunity for engineers in different situations to capture and create very accurate and high-detailed 3D models. The Structure-from-Motion Multi-View Stereo (SfM-MVS) photogrammetry is a prominent way of reducing capturing time even more by using a 360-degree camera. In situations of buildings in distress, especially those exposed to extreme environmental hazards, such a method for rapid photogrammetric reconstructions seems to be the most suitable one for everyone, especially for first responders. Therefore, the application of SfM-MVS photogrammetry in first response inspection of distressed buildings is presented in a case study from a recent earthquake series that happened during the year 2020 in Croatia. The goal of this paper is to bring insights into the possibilities of applying SfM-MVS photogrammetry in the built environment and to present such digital models in a way that can help first responders make informative decisions for inspecting distressed buildings.