Spatio-spectral Heterogeneity Analysis Using EO-1 Hyperion Imagery

Document Type

Article

Publication Date

2-2010

Keywords

hyperspectral imagery, semivariogram analysis, spatio-spectral heterogeneity

Abstract

How does observed spatial structure change as a function of spectral wavelength and resolution? The fine spectral resolution data of a Hyperion image acquired over agricultural research fields in eastern Nebraska, USA, were analyzed using variography to characterize spatial patterns within each wavelength-specific image. The geospatial analysis was repeated simulating Landsat TM/ETM+ bands from the Hyperion data. Significant changes in spatio-spectral heterogeneity were observed across the red edge. The total amount of spatial variability is closely correlated to the contrast in brightness of objects within the scene. The spatial dependence in an image is also influenced by differential brightness, but to a lesser extent. Increasing bandwidth may blur spatial structure that occurs at finer spectral resolution, resulting in the loss of spatial structure that may relate to significant features within the scene.

Publication Title

Computers & Geosciences

Volume

36

Issue

2

First Page

167

Last Page

170

DOI of Published Version

10.1016/j.cageo.2009.05.005

Publisher

Elsevier

Rights

© 2009 Elsevier Ltd.

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