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arXiv · 2601.17791

Agreement-Driven Multi-View 3D Reconstruction for Live Cattle Weight Estimation

Rabin Dulal·Wenfeng Jia·Lihong Zheng·Jane Quinn
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Abstract

Accurate cattle live weight estimation is vital for livestock management, welfare, and productivity. Traditional methods, such as manual weighing using a walk-over weighing system or proximate measurements using body condition scoring, involve manual handling of stock and can impact productivity from both a stock and economic perspective. To address these issues, this study investigated a cost-effective, non-contact method for live weight calculation in cattle using 3D reconstruction. The proposed pipeline utilized multi-view RGB images with SAM 3D-based agreement-guided fusion, followed by ensemble regression. Our approach generates a single 3D point cloud per animal and compares classical ensemble models with deep learning models under low-data conditions. Results show that SAM 3D with multi-view agreement fusion outperforms other 3D generation methods, while classical ensemble models provide the most consistent performance for practical farm scenarios (R$^2$ = 0.69 $\pm$ 0.10, MAPE = 2.22 $\pm$ 0.56 \%), making this practical for on-farm implementation. These findings demonstrate that improving reconstruction quality is more critical than increasing model complexity for scalable deployment on farms where producing a large volume of 3D data is challenging.

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Rabin Dulal, Wenfeng Jia, Lihong Zheng, Jane Quinn. 2026-01-25. Agreement-Driven Multi-View 3D Reconstruction for Live Cattle Weight Estimation. https://arxiv.org/abs/2601.17791

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