Detection of Ground Materials Using Normalized Difference Indices with a Threshold: Risk and Ways to Improve
Chen Fen, Tim Van de Voorde, Dar A. Roberts, Haojie Zhao, Jingbo Chen
Abstract
In this short communication, we describe the shortcomings and pitfalls of a commonly used method to detect ground materials that relies on setting thresholds for normalized difference indices. We analyze this method critically and present some experimental results on the USGS and ECOSTRESS spectral libraries and on real Sentinel-2 and Landsat-8 images. We demonstrate the risk of commission errors and provide some suggestions to reduce it.
Topics & Concepts
Remote sensingComputer scienceGeologyRemote-Sensing Image ClassificationGeochemistry and Geologic MappingAdvanced Image Fusion Techniques