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Proceedings Paper

Hyperspectral imagery for mineral exploration: comparison of data from two airborne sensors
Author(s): Robert A. Neville; C. Nadeau; John Levesque; Tomas Szeredi; Karl Staenz; P. Hauff; Gary A. Borstad
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Paper Abstract

Hyperspectral image data sets acquired near Cuprite, Nevada in 1995 with the SWIR full spectrum imager (SFSI) and in 1996 with the Airborne Visible/IR Imaging Spectrometer (AVIRIS) are analyzed with a spectral unmixing procedure and the result compared. The SFSI image has pixels on 1 m by 1.5 m centers, the AVIRIS on 17 m centers; the region imaged by SFSI is a small portion of the full AVIRIS scene. Both have nominal spectral band center spacings of about 10 nm. The image data, converted to radiance units, are atmospherically corrected and converted to surface reflectance. Spectral end members are extracted automatically from the two data sets; those representing mineral species common to both are compared to each other and to reference spectra obtained with a portable IR mineral analyzer. The full sets of end members are used in a constrained linear unmixing of the respective hyperspectral image cubes. The resulting unmixing fraction images derived from the AVIRIS and the SFSI data sets for the minerals alunite, buddingtonite, and kaolinite exhibit strong similarities.

Paper Details

Date Published: 16 October 1998
PDF: 10 pages
Proc. SPIE 3438, Imaging Spectrometry IV, (16 October 1998); doi: 10.1117/12.328124
Show Author Affiliations
Robert A. Neville, Canada Ctr. for Remote Sensing (Canada)
C. Nadeau, Univ. de Sherbrooke (Canada)
John Levesque, MIR Teledetection Inc. (United States)
Tomas Szeredi, MacDonald Dettwiler and Associates (Canada)
Karl Staenz, Canada Ctr. for Remote Sensing (Canada)
P. Hauff, Spectral International Inc. (United States)
Gary A. Borstad, G.A. Borstad Associates Ltd. (Canada)

Published in SPIE Proceedings Vol. 3438:
Imaging Spectrometry IV
Michael R. Descour; Sylvia S. Shen, Editor(s)

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