Anomaly detection imaging spectrometry in the central volcanic coordillera of Costa Rica. Implications for planetary exploration

Abstract

The aim of this work is the comparative study of methods for calculating spectral anomalies from imaging spectrometry test in several areas of the Central Volcanic Range (CVC) of Costa Rica. In the detection of anomalous responses is assumed no prior knowledge of the targets, so that the pixels are automatically separated according to their spectral information significantly differentiated with respect to a background to be estimated, either globally for the entire scene, either locally by the image segmentation.

We used spectral ranges of visible-near infrared (VNIR), shortwave infrared (SWIR) and thermal (TIR) data cubes hiperepectrales from HyMAP airborne sensors and MASTER. We have designed experiments on natural scenes of the CVC, urban and semi-urban of different complexity, analyzing the behavior of the standard RX anomaly detector and different approaches based on imaging and dimensionality reduction. We discuss the results and is an approximation of the involvement as terrestrial counterparts in planetary exploration.

Revista Ciencias Espaciales, Volumen 8, Número 2 Otoño, 2015; 272-286