Friday, Oct. 31, 2025
10:20 – 11:10 a.m. in ETB 1020
Dr. Zigfried Hampel-Arias
Spectral and Geospatial Remote Sensing Team
Los Alamos National Lab
Title: “Machine Learning for Hyperspectral Imagery Applications: Trusting Our Models“
Abstract:
Hyperspectral imaging (HSI) comprises a rich source of remote sensing data and is crucial for remote detection of various targets, including gases, liquids, and solids. The advent of deep learning approaches has shown promising results for material detection and identification within long wave infrared (LWIR) HSI. We first introduce the utility of machine learning as a HSI analysis tool, explore the use of physics-guided neural networks as compared to black-box NN models for material classification, and discuss the role of explainability methodology in such analysis. We then discuss the application of 3D scene understanding methods using multiple observations from different angles to create spatially-relevant representations of HSI data, enhancing our ability to characterize targets when obscured by other objects in the scene. We will present results from our analysis pipeline, demonstrating our machine learning approach to the ill-posed inverse problem of material identification and the spectral scaling of neural radiance field (NeRF) models for 3D scene understanding, while also including uncertainty quantification methods to measure associated confidence in our spatial-spectral modeling.
Biography:
Zigfried Hampel-Arias is on the Spectral and Geospatial Remote Sensing team in the Intelligence and Space Research division at Los Alamos National Lab, with main research interests in applying deep learning to hyperspectral imaging, reinforcement learning to astro-dynamical systems and the national security implications of a robust innovation ecosystem. He received his BS in Chemical Physics from Rice University, conducted astrophysics research in Argentina, completed his PhD in physics at UW-Madison, finished a postdoc in Belgium and spent a few years in machine learning in the Bay Area. You can frequently find Zig somewhere in the mountains on bike or skis, occasionally with one of his daughters strapped tightly to him.