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Hyperspectral Image Unmixing via Alternating Projected Subgradients

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5 Author(s)
Zymnis, A. ; Stanford Univ., Stanford ; Kim, S.J. ; Skaf, J. ; Parente, M.
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We consider the problem of factorizing a hyperspectral image into the product of two nonnegative matrices, which represent nonnegative bases for image spectra and mixing coefficients, respectively. This spectral unmixing problem is a nonconvex optimization problem, which is very difficult to solve exactly. We present a simple heuristic for approximately solving this problem based on the idea of alternating projected subgradient descent. Finally, we present the results of applying this method on the 1990 AVIRIS image of Cuprite, Nevada and show that our results are in agreement with similar studies on the same data.

Published in:

Signals, Systems and Computers, 2007. ACSSC 2007. Conference Record of the Forty-First Asilomar Conference on

Date of Conference:

4-7 Nov. 2007

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