Spatial segmentation of multi/hyperspectral imagery by fusion of spectral-gradient-textural attributes

Sreenath Rao Vantaram; Sankaranarayanan Piramanayagam; Eli Saber; David Messinger

doi:10.1117/1.JRS.9.095086

31 March 2015 Spatial segmentation of multi/hyperspectral imagery by fusion of spectral-gradient-textural attributes

Sreenath Rao Vantaram, Sankaranarayanan Piramanayagam, Eli Saber, David Messinger

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 9, Issue 1, 095086 (March 2015). https://doi.org/10.1117/1.JRS.9.095086

Abstract

We propose an unsupervised algorithm that utilizes information derived from spectral, gradient, and textural attributes for spatially segmenting multi/hyperspectral remotely sensed imagery. Our methodology commences by determining the magnitude of spectral intensity variations across the input scene, using a multiband gradient detection scheme optimized for handling remotely sensed image data. The resultant gradient map is employed in a dynamic region growth process that is initiated in pixel locations with small gradient magnitudes and is concluded at sites with large gradient magnitudes, yielding a map comprised of an initial set of regions. This region map is combined with several co-occurrence matrix-derived textural descriptors along with intensity and gradient features in a multivariate analysis-based region merging procedure that fuses the regions with similar characteristics to yield the final segmentation output. Our approach was tested on several multi/hyperspectral datasets, and the results show a favorable performance in comparison with state-of-the-art techniques.

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Sreenath Rao Vantaram, Sankaranarayanan Piramanayagam, Eli Saber, and David Messinger "Spatial segmentation of multi/hyperspectral imagery by fusion of spectral-gradient-textural attributes," Journal of Applied Remote Sensing 9(1), 095086 (31 March 2015). https://doi.org/10.1117/1.JRS.9.095086

Published: 31 March 2015

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