Anomaly Detection Based on Sigmoid Metric and Object Area Filtering in
Hyperspectral Images
Abstract
This paper outlines a new approach to detect anomalies in hyperspectral
images based on peripheral pixels. The proposed methodology contains two
main steps. First, a new distance score is introduced based on the
sigmoid function and root mean square error (RMSE). We estimate how
likely the target pixel is an anomaly by averaging the new metric over
its neighboring window.
Second, a state-of-the-art method is applied to eliminate unacceptable
objects according to their size. In this light, the objects whose size
is out of an acceptable interval are removed.
Comprehensive experimental evaluations have been conducted to confirm
that the proposed method significantly outperforms several recent
algorithms in accuracy and computational time.