Multi-Epoch and Multi-Imagery (MEMI) Photogrammetric Workflow for Enhanced Change Detection Using Time-Lapse Cameras

Photogrammetric models have become a standard tool for the study of surfaces, structures and natural elements. As an alternative to Light Detection Ranging (LiDAR), photogrammetry allows 3D point clouds be obtained at much lower cost. This paper presents enhanced workflow image-based reconstruction high-resolution designed work with fixed time-lapse camera systems, based on multi-epoch multi-images (MEMI) exploit redundancy. is part fully automatic working setup that includes all steps: from capturing images obtaining clusters change detection. The capable photogrammetric higher quality than classic Structure Motion (SfM) workflow. MEMI reduced error up factor 2 when compared previous approach, allowing M3C2 deviation 1.5 cm. In terms absolute accuracy, using LiDAR data as reference, our proposed method 20% more accurate automation well improvement reconstructed enables 4D analysis in near-real time.