DPG-CD: Depth-Prior-Guided Cross-Modal Joint 2D-3D Change Detection

ArXi:2605.07151v1 Announce Type: cross Urban spatial evolution is manifested not only through horizontal expansion but also through vertical structural changes. Consequently, jointly capturing 2D semantic changes and 3D height changes is essential for urban morphology analysis and emergency management. In practical scenarios, collecting 3D observations is often constrained by high acquisition costs and the inability to frequent updates.