Park, Hansoo Kim, Soomin Heryanto, Bryan Lim, Hwasup 2025-04-09T08:31:13Z 2025-04-09T08:31:13Z 2025-04-09 2025-02 https://pubs.kist.re.kr/handle/201004/152234 We propose a novel 3D human reconstruction system designed for diverse settings including outdoor environments. Existing methods face the challenges of portability, robustness, and adaptability to environmental variations, as they often rely on sensor data or handcrafted features for marker detection in camera calibration. Consequently, these methods are often limited in outdoor environments. To overcome these limitations, we employ a simple ball-wand as a marker and leverage visual foundation models for marker detection. Our approach enables precise multi-camera calibration without requiring bulky, sensor-specific calibration tools and dependence on controlled environments. Additionally, we introduce a framework that reconstructs 3D human model from sparse input views using occupancy and neural radiance fields. By using sparse views as input, our method efficiently captures both the geometry and appearance of humans in outdoor scenarios, eliminating the need for numerous cameras. We validated our system through extensive experiments on both synthetic human scan datasets and real-world outdoor datasets. The results demonstrate that our system accurately optimizes camera parameters and reconstructs high-quality 3D human models in both outdoor environments and synthetic scenarios. English Institute of Electrical and Electronics Engineers Inc. Robust 3D Human Reconstruction System From Sparse Views in Outdoor Environments Article 10.1109/ACCESS.2025.3544877 1 IEEE Access, v.13, pp.48034 - 48046 IEEE Access 13 48034 48046 Y scie scopus 001447533700031 2-s2.0-105001209031 Computer Science, Information Systems Engineering, Electrical & Electronic Telecommunications Computer Science Engineering Telecommunications Article CAMERA Calibration Cameras Image reconstruction Feature extraction Solid modeling Image color analysis Geometry Detectors Robustness 3D human reconstruction extrinsic calibration neural rendering multi-camera calibration Three-dimensional displays