Target-based Hyperspectral Demixing via Generalized Robust PCA
This work addresses target detection in hyperspectral imaging for applications like remote sensing and surveillance, presenting an incremental improvement over existing methods.
The paper tackles the problem of localizing targets in hyperspectral images by modeling them as a superposition of low-rank and dictionary-sparse components, and demonstrates its approach via experimental validation on real data with comparisons to related techniques.
Localizing targets of interest in a given hyperspectral (HS) image has applications ranging from remote sensing to surveillance. This task of target detection leverages the fact that each material/object possesses its own characteristic spectral response, depending upon its composition. As $\textit{signatures}$ of different materials are often correlated, matched filtering based approaches may not be appropriate in this case. In this work, we present a technique to localize targets of interest based on their spectral signatures. We also present the corresponding recovery guarantees, leveraging our recent theoretical results. To this end, we model a HS image as a superposition of a low-rank component and a dictionary sparse component, wherein the dictionary consists of the $\textit{a priori}$ known characteristic spectral responses of the target we wish to localize. Finally, we analyze the performance of the proposed approach via experimental validation on real HS data for a classification task, and compare it with related techniques.