The paper presents a close‑range photogrammetry workflow using Structure‑from‑Motion and Multi‑View Stereo to generate high‑resolution 3D point clouds of rubberised concrete. By capturing images with a Canon DSLR and an iPhone 16, the authors achieved sub‑millimetre reconstruction accuracy, outperforming traditional LiDAR for fine‑scale defect analysis. An RGB‑guided crack extraction method and deformation analysis further demonstrate the method’s utility for detailed surface monitoring and material performance evaluation.
By Jiacheng Liu, Mohammed Alnahhal, Ailar Hajimohammadi, Sara Gonizzi Barsanti, Jinling Wang, Mohsen Kalantari
arXiv:2512. 09062v2 Announce Type: replace-cross Abstract: Accurate 3D scene interpretation in active construction sites is essential for progress monitoring, safety assessment, and digital twin development.
By Seongyong Kim, Yong Kwon Cho
arXiv:2609.28154v1 Announce Type: new
Abstract: Global building and settlement datasets increasingly support population mapping, exposure assessment, urban monitoring, and other analyses of the built...
By Rufai Omowunmi Balogun, Caroline Margaux Gevaert, Capucine Riom, Derrick Mirindi, Aaron Opdyke, Hamed Alemohammad, Pierre Chrzanowski, Edward Charles Anderson
arXiv:2606. 09882v1 Announce Type: cross Abstract: The paradigm of digital twin cities is shifting from coarse visual mapping toward more precise and actionable digitization of urban assets.
By Chong Liu, Luxuan Fu, Xuyu Feng, Zhen Dong, Bisheng Yang
The paper introduces a novel, training‑free, LLM‑driven closed‑loop framework for fusing dual‑source encrypted points of interest (DSEP) to improve land‑use/land‑cover (LULC) mapping. By iteratively refining location transformations and attribute correspondences—using LLM‑based matching, particle swarm optimization, and fuzzy attribute reassessment—the method reduces matching complexity from O(N²) to O(N) and converges in about two iterations. Experiments across 31 Chinese provincial capitals demonstrate a 4.58 m average location residual and 95.12 % attribute accuracy, outperforming existing baselines by 1.77 m and 14.87 % respectively, and enabling georeferencing of encrypted vector data to WGS‑84 without ground control points.
By Chang Li, Xingtao Peng, Yongjun Zhang, Yinfei He, Cairun Huang
arXiv:2609.37071v1 Announce Type: new
Abstract: Non-rigid point-cloud registration aims to find the corresponding target point for each point on a deforming source surface. Point-level matching keeps...
By Yuzhen He, Sara Homscheid