Blind source separation applied to spectral unmixing: comparing different measures of nongaussianity

Caiafa C F, Salerno E, Proto A N

Blind spectral unmixing  Dependent component analysis  Measures of nongaussianity  Hyperspectral images  Unsupervised classification 

We report some of our results of a particular blind source separation technique applied to spectral unmixing of remote-sensed hyperspectral images. Different nongaussianity measures are introduced in the learning procedure, and the results are compared to assess their relative efficiencies, with respect to both the output signal-to-interference ratio and the overall computational complexity. This study has been conducted on both simulated and real data sets, and the first results show that skewness is a powerful and unexpensive tool to extract the typical sources that charcterize remote-sensed images.