Linearized vegetation indices based on a formal statistical framework

ÜNSALAN C., Boyer K.

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, cilt.42, sa.7, ss.1575-1585, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42 Sayı: 7
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1109/tgrs.2004.826787
  • Dergi Adı: IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1575-1585
  • Anahtar Kelimeler: IKONOS data, multispectral images, principal components analysis (PCA), vegetation indices, LEAF-AREA INDEX, SENSITIVITY-ANALYSIS, GLOBAL VEGETATION, SPECTRAL INDEXES, BROAD-BAND, DATA SET, NDVI, COVER, AVHRR, LIGHT
  • Marmara Üniversitesi Adresli: Hayır

Özet

Vegetation indices have been used extensively to estimate the vegetation density from satellite and airborne images for many years. In this paper, we focus on one of the most popular of such indices, the normalized difference vegetation index (NDVI), and we introduce a statistical framework to analyze it. As the degree of vegetation increases, the corresponding NDVI values begin to saturate and cannot represent highly vegetated regions reliably. By adopting the statistical viewpoint, we show how to obtain a linearized and more reliable measure. While the NDVI uses only red and near-infrared bands, we use the statistical framework to introduce new indices using the blue and green bands as well. We compare these indices with that obtained by linearizing the NDVI with extensive experimental results on real IKONOS multispectral images.