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TitleHyperspectral Imagery for Mineral Exploration: Comparison of Data from Two Airborne Sensors
AuthorNeville, R A; Nadeau, C; Lévesque, J; Szeredi, T; Staenz, K; Hauff, P; Borstad, G A
SourceProceedings of SPIE's International Conference on Imaging Spectrometry VI, San Diego, California, 20-21 July; 3438, 1998 p. 74-83
Alt SeriesEarth Sciences Sector, Contribution Series 20042581
AbstractHyperspectral image data sets acquired near Cuprite, Nevada, in 1995 with the SWIR Full Spectrum Imager (SFSI and in 1996 with the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) are analysed with a spectral unmixing procedure and the results compared. The SFSI image has pixels on 1 m by 1.5 m centres, the AVIRIS on 17 m centres; the region imaged by SFSI is a small portion of the full AVIRIS scene. Both have nominal spectral band centre spacings of about 10 nm. The image data, converted to radiance units, are atmospherically corrected and converted to surface reflectances. 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 Infrared Mineral Analyser (PIMA). 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.

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