Title :
Spectral enhancement of sebass hyperspectral data and its application in mapping of ultramafic rocks
Author :
Feng, Jianjiang ; Rivard, Benoit ; Rogge, D.M. ; Grant, B.
Author_Institution :
Dept. of Earth & Atmos. Sci., Univ. of Alberta, Edmonton, AB, Canada
Abstract :
Airborne SEBASS data (measuring hyperspectral thermal emissivity) was acquired and analyzed to map the spatial distribution of ultramafic rocks in remote areas of the Cape Smith greenstone Belt in Nunavik, Northern Quebec, Canada. Spectral analysis in the wavelet domain was developed to address technical issues commonly encountered in these data, namely noise reduction and minimization of atmospheric and surface temperature effects. Mapping of rock units was conducted using the spectral angle mapper applied to image endmembers extracted during wavelet analysis. The endmembers largely represent a suite of minerals validated with X-Ray Diffraction analysis and spectral measurement of rock samples.
Keywords :
X-ray diffraction; atmospheric temperature; feature extraction; geophysical image processing; hyperspectral imaging; minerals; minimisation; rocks; spectral analysis; terrain mapping; wavelet transforms; Canada; Cape Smith greenstone Belt; Northern Quebec; Nunavik; SEBASS hyperspectral data; X-ray diffraction analysis; airborne SEBASS data; atmospheric temperature effect; hyperspectral thermal emissivity; image endmembers; minerals; minimization; noise reduction; rock samples; rock unit mapping; spatial distribution; spectral analysis; spectral angle mapper; spectral enhancement; spectral measurement; surface temperature effect; ultramafic rocks; wavelet analysis; wavelet domain; Abstracts; Laboratories; Minerals; Rocks; SEBASS; Wavelet analysis; mapping ultramafic rocks; mineral abundance; spectral enhancement;
Conference_Titel :
Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS), 2012 4th Workshop on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4799-3405-8
DOI :
10.1109/WHISPERS.2012.6874248
