DocumentCode :
1754405
Title :
Detecting the Adjacency Effect in Hyperspectral Imagery With Spectral Unmixing Techniques
Author :
Burazerovic, Dzevdet ; Heylen, Rob ; Geens, B. ; Sterckx, S. ; Scheunders, Paul
Author_Institution :
iMinds-Vision Lab., Univ. of Antwerp, Antwerp, Belgium
Volume :
6
Issue :
3
fYear :
2013
fDate :
41426
Firstpage :
1070
Lastpage :
1078
Abstract :
The adjacency effect is an interesting phenomenon characterized by the occurrence of path interferences between the reflectances coming from different ground-cover materials. The effect is caused by atmospheric scattering, hence a typical approach to its detection has been the modeling of radiation transfer and spectral correspondence at particular wavelengths. In this paper, we investigate the detection of adjacency effects as being a general unmixing problem. This means that we opt to use spectral unmixing to separate the true signature of a pixel from the background scatter reflected from its adjacent neighborhood. To account for different types of atmospheric scattering, we consider several unmixing methods. These include the established linear- and a recently studied generalized bilinear model, as well as a more data-driven unmixing that could implicitly address nonlinearities not covered by the first mentioned approaches. We evaluate these unmixing models by comparing their results with those obtained from a specialized treatment of the adjacency effect in turbid waters surrounded by vegetated land. This comparison is demonstrated on real data acquired under varying atmospheric conditions.
Keywords :
atmospheric optics; atmospheric radiation; geophysical image processing; hyperspectral imaging; mixing; spectral analysis; vegetation mapping; atmospheric conditions; atmospheric scattering; background scatter; data-driven unmixing; general unmixing problem; generalized bilinear model; ground-cover materials; hyperspectral imagery; pixel signature; radiation transfer; spectral correspondence; spectral unmixing; spectral unmixing techniques; turbid waters; vegetated land; Atmospheric modeling; Materials; Mathematical model; Photonics; Scattering; Surface topography; Vegetation mapping; Adjacency effect; image processing; linear unmixing; nonlinear unmixing; remote sensing; spectral unmixing;
fLanguage :
English
Journal_Title :
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of
Publisher :
ieee
ISSN :
1939-1404
Type :
jour
DOI :
10.1109/JSTARS.2013.2240656
Filename :
6450126
Link To Document :
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