Anomaly detection for replacement model in hyperspectral imaging

In this paper we consider Anomaly Detection in the hyperspectral context, and we extend the popular RX detector, initially designed under the standard additive model, to the replacement model case. Indeed, in this more realistic framework, the target, if present, is supposed to replace a part of the background. We show how to estimate this background power variation to improve the standard RX scheme. The obtained Replacement RX (RRX) is shown to be closed-form and outperforms the standard RX on a real data benchmark experiment. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

In this paper, the popular RX detector is extended to the more realistic replacement model case in the context of hyperspectral anomaly detection. By estimating the background power variation, the standard RX scheme is improved to obtain the closed-form Replacement RX (RRX), which outperforms the standard RX in a real data benchmark experiment.