03/09/2026
📄 New Scientifc Paper: Reflectance-based radiometric adjustment for aerial imagery
Consistent radiometric quality is essential for extracting reliable information from aerial imagery, especially when comparing data captured under different illumination conditions, on different dates, or with different sensors.
In a paper published in the ISPRS Archives and presented at ISPRS Geospatial Week 2026 in Toronto, experts from Vexcel Imaging investigate how reflectance measurements can improve the radiometric adjustment of aerial imagery and create more consistent, physically meaningful image products.
Focusing on UltraCam data, the authors present a workflow that combines ground truth measurements, camera spectral sensitivity, and sun angle information to convert imagery into reflectance units and stabilize radiometric processing.
Key findings include:
✅ Improved consistency across acquisition dates, illumination conditions, and sensors
✅ Better comparability of derived products such as NDVI
✅ Closer agreement with expected literature values and Sentinel-based reference products
✅ A reflectance estimation model that enables large-scale production workflows even without direct ground measurements
The results demonstrate how reflectance-based radiometric adjustment can improve the reliability and comparability of aerial imagery, supporting more accurate analysis for vegetation monitoring and other geospatial applications.
📄 Read the paper: https://bit.ly/4guV9mF