arXiv:2503.03115cs.CV2025-03CVPR被引 11

用热力学建模夜间温度变化,实现动态热红外三维重建

NTR-Gaussian: Nighttime Dynamic Thermal Reconstruction with 4D Gaussian Splatting Based on Thermodynamics

  • 将温度视为热辐射,融合对流与辐射传热机制
  • 预测误差低于1摄氏度,显著优于现有方法
  • 适合建筑监测、能源管理等需要动态温场分析的场景

热红外成像具有全天候优势,可非接触测量物体表面温度。因此常用于重建反映场景温度分布的3D模型,服务于建筑监测与能源管理等应用。然而,现有方法多聚焦单一时段的静态3D重建,忽视环境因素对热辐射的影响,无法预测或分析温度随时间的变化。为此,我们提出NTR-Gaussian方法,将温度视作热辐射形式,引入对流换热与辐射散热等热力学要素。通过神经网络预测发射率、对流换热系数和热容等热力学参数,结合预测结果,可准确预报夜间场景各时刻的温度分布。此外,我们构建了一个专门针对夜间热成像的动态数据集。大量实验表明,NTR-Gaussian在热重建任务中显著优于对比方法,预测温度误差控制在1摄氏度以内。

原文摘要 · Abstract (English)

Thermal infrared imaging offers the advantage of all-weather capability, enabling non-intrusive measurement of an object's surface temperature. Consequently, thermal infrared images are employed to reconstruct 3D models that accurately reflect the temperature distribution of a scene, aiding in applications such as building monitoring and energy management. However, existing approaches predominantly focus on static 3D reconstruction for a single time period, overlooking the impact of environmental factors on thermal radiation and failing to predict or analyze temperature variations over time. To address these challenges, we propose the NTR-Gaussian method, which treats temperature as a form of thermal radiation, incorporating elements like convective heat transfer and radiative heat dissipation. Our approach utilizes neural networks to predict thermodynamic parameters such as emissivity, convective heat transfer coefficient, and heat capacity. By integrating these predictions, we can accurately forecast thermal temperatures at various times throughout a nighttime scene. Furthermore, we introduce a dynamic dataset specifically for nighttime thermal imagery. Extensive experiments and evaluations demonstrate that NTR-Gaussian significantly outperforms comparison methods in thermal reconstruction, achieving a predicted temperature error within 1 degree Celsius.

热红外重建动态建模热力学

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