# Unsupervised Feature Selection Based on Ultrametricity and Sparse Training Data: A Case Study for the Classification of High-Dimensional Hyperspectral Data

> Research article (Remote Sensing, 2018) · cited 20× · AI/ML

**Wikidata**: [openalex:W2895382986](https://www.wikidata.org/wiki/openalex:W2895382986)  
**Source**: https://4ort.xyz/entity/unsupervised-feature-selection-based-on-ultrametricity-and-sparse-training-data-a-case-study-for-the-classification-of-h