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Parallel Morphological Endmember Extraction Using Commodity Graphics Hardware

Javier Setoain, Manuel Prieto, Christian Tenllado, Antonio Plaza, Francisco Tirado
Department of Computer Architecture, Complutense University, E-28040 Madrid, Spain
IEEE Geoscience and Remote Sensing Letters, 2007

@article{setoain2007parallel,

   title={Parallel morphological endmember extraction using commodity graphics hardware},

   author={Setoain, J. and Prieto, M. and Tenllado, C. and Plaza, A. and Tirado, F.},

   journal={Geoscience and Remote Sensing Letters, IEEE},

   volume={4},

   number={3},

   pages={441–445},

   year={2007},

   publisher={IEEE}

}

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Spatial/spectral algorithms have been shown in previous work to be a promising approach to the problem of extracting image end members from remotely sensed hyperspectral data. Such algorithms map nicely on high-performance systems such as massively parallel clusters and networks of computers. Unfortunately, these systems are generally expensive and difficult to adapt to onboard data processing scenarios, in which low-weight and low-power integrated components are highly desirable to reduce mission payload. An exciting new development in this context is the emergence of graphics processing units (GPUs), which can now satisfy extremely high computational requirements at low cost. In this letter, we propose a GPU-based implementation of the automated morphological end member extraction algorithm, which is used in this letter as a representative case study of joint spatial/spectral techniques for hyperspectral image processing. The proposed implementation is quantitatively assessed in terms of both end member extraction accuracy and parallel efficiency, using two generations of commercial GPUs from NVidia. Combined, these parts offer a thoughtful perspective on the potential and emerging challenges of implementing hyperspectral imaging algorithms on commodity graphics hardware.
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