Name
Title | ||
|---|---|---|
Nonlinear spectral unmixing using residual component analysis and a Gamma Markov random field |
Abstract | ||
|---|---|---|
This paper presents a new Bayesian nonlinear unmixing model for hyperspectral images. The proposed model represents pixel reflectances as linear mixtures of end-members, corrupted by an additional combination of nonlinear terms (with respect to the end-members) and additive Gaussian noise. A central contribution of this work is to use a Gamma Markov random field to capture the spatial structure and correlations of the nonlinear terms, and by doing so to improve significantly estimation performance. In order to perform hyperspectral image unmixing, the Gamma Markov random field is embedded in a hierarchical Bayesian model representing the image observation process and prior knowledge, followed by inference with a Markov chain Monte Carlo algorithm that jointly estimates the model parameters of interest and marginalises latent variables. Simulations conducted with synthetic and real data show the accuracy of the proposed SU and nonlinearity estimation strategy for the analysis of hyperspectral images. |
Year | DOI | Venue |
|---|---|---|
2015 | 10.1109/CAMSAP.2015.7383762 | 2015 IEEE 6th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP) |
Keywords | Field | DocType |
Hyperspectral imagery,nonlinear spectral unmixing,residual component analysis,Gamma Markov random field,Bayesian estimation | Bayesian inference,Markov process,Pattern recognition,Markov model,Markov random field,Hyperspectral imaging,Artificial intelligence,Variable-order Markov model,Gaussian noise,Mathematics,Bayesian probability | Conference |
Citations | PageRank | References |
0 | 0.34 | 10 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yoann Altmann | 1 | 229 | 22.58 |
| Marcelo Pereyra | 2 | 142 | 16.00 |
| Stephen McLaughlin | 3 | 464 | 43.14 |