Thermal Imaging and 3D Mapping of Built Environments
Summary
Thermal imaging and three-dimensional (3D) mapping have emerged as complementary techniques for detailed assessment of built environments. By capturing infrared radiation emitted from building surfaces, thermal imaging reveals temperature distributions and highlights heat losses, moisture ingress or structural defects without physical contact. Concurrently, 3D mapping methods—such as photogrammetry, terrestrial laser scanning and depth sensing—reconstruct precise geometric models of façades, interiors and complex architectural elements. When fused, thermal and spatial data produce enriched models that support energy audits, conservation planning, structural diagnostics and heritage documentation. Advances in sensor calibration, automated registration and data-fusion algorithms have enabled real-time scanning workflows, mobile platforms and low-cost systems that widen accessibility. The integration of thermal and geometric datasets underpins smart-city initiatives, sustainable renovation strategies and predictive maintenance, delivering actionable insights for engineers, conservationists and urban planners worldwide.
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Thermal Imaging and 3D Mapping of Built Environments publication trend
The graph below shows the total number of articles in thermal imaging and 3d mapping of built environments across all publications each year (not limited to Nature Index journals).
Technical terms
Thermal imaging: Non-contact measurement of surface temperature by capturing infrared radiation.
3D mapping: Reconstruction of spatial geometry into digital three-dimensional models.
Point cloud: A set of 3D data points representing surface coordinates, typically generated by laser scanning or photogrammetry.
Structure-from-Motion (SfM): Photogrammetric technique to infer 3D structure from multiple 2D images taken at different viewpoints.
Iterative Closest Point (ICP): Algorithm that refines spatial alignment between two point clouds by minimising distances between corresponding points.
Georeferencing: Assigning real-world coordinates to digital models or maps to link them with geographic information systems.
References
- Fusion of Infrared Thermal Image and Visible Image for 3D Thermal Model Reconstruction Using Smartphone Sensors. Sensors (2018).
- Depth and thermal sensor fusion to enhance 3D thermographic reconstruction.. Optics Express (2018).
- 3D Thermal Imaging System with Decoupled Acquisition for Industrial and Cultural Heritage Applications. Applied Sciences (2020).
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