Imaging Techniques: Geometric and Radiometric Distortions

This lecture covers the principles of imaging techniques, focusing on geometric and radiometric distortions in aerial photography. It begins with an overview of the effects of relief on aerial images, explaining how the apparent displacement of objects increases with distance from the optical center and the height of the object. The instructor discusses radiometric effects, including exposure loss and bidirectional reflectance, emphasizing how these factors influence image quality. The lecture also introduces the concept of photogrammetry, which relies on apparent displacements to determine geometric properties of objects. The importance of radiometers in measuring radiation intensity across various spectral bands is highlighted, along with examples of data collected from satellites like SMOS and GPM. The session concludes with a summary of key concepts, including the historical perspective of photographic imaging and the significance of understanding distortions for accurate data interpretation in remote sensing applications.