Hyperspectral unmixing using macroscopic and microscopic mixture models

Ryan R. Close; Paul D. Gader; Joseph Wilson

doi:10.1117/1.JRS.8.083642

29 April 2014 Hyperspectral unmixing using macroscopic and microscopic mixture models

Ryan R. Close, Paul D. Gader, Joseph Wilson

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 8, Issue 1, 083642 (April 2014). https://doi.org/10.1117/1.JRS.8.083642

Abstract

Macroscopic and microscopic mixture models and algorithms for hyperspectral unmixing are presented. Unmixing algorithms are derived from an objective function. The objective function incorporates the linear mixture model for macroscopic unmixing and a nonlinear mixture model for microscopic unmixing. The nonlinear mixture model is derived from a bidirectional reflectance distribution function for microscopic mixtures. The algorithm is designed to unmix hyperspectral images composed of macroscopic or microscopic mixtures. The mixture types and abundances at each pixel can be estimated directly from the data without prior knowledge of mixture types. Endmembers can also be estimated. Results are presented using synthetic data sets of macroscopic and microscopic mixtures and using well-known, well-characterized laboratory data sets. The unmixing accuracy of this new physics-based algorithm is compared to linear methods and to results published for other nonlinear models. The proposed method achieves the best unmixing accuracy.

Citation Download Citation

Ryan R. Close, Paul D. Gader, and Joseph Wilson "Hyperspectral unmixing using macroscopic and microscopic mixture models," Journal of Applied Remote Sensing 8(1), 083642 (29 April 2014). https://doi.org/10.1117/1.JRS.8.083642

Published: 29 April 2014

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