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Assimilation of endmember variability in spectral for urban land cover extraction mixture analysis

Kumar, Uttam and Raja, Kumar S and Mukhopadhyay, Chiranjit and Ramachandra, TV (2013) Assimilation of endmember variability in spectral for urban land cover extraction mixture analysis. In: ADVANCES IN SPACE RESEARCH, 52 (11). pp. 2015-2033.

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Official URL: http://dx.doi.org/10.1016/j.asr.2013.08.022


Variable Endmember Constrained Least Square (VECLS) technique is proposed to account endmember variability in the linear mixture model by incorporating the variance for each class, the signals of which varies from pixel to pixel due to change in urban land cover (LC) structures. VECLS is first tested with a computer simulated three class endmember considering four bands having small, medium and large variability with three different spatial resolutions. The technique is next validated with real datasets of IKONOS, Landsat ETM+ and MODIS. The results show that correlation between actual and estimated proportion is higher by an average of 0.25 for the artificial datasets compared to a situation where variability is not considered. With IKONOS, Landsat ETM+ and MODIS data, the average correlation increased by 0.15 for 2 and 3 classes and by 0.19 for 4 classes, when compared to single endmember per class. (C) 2013 COSPAR. Published by Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: copyright for this article belongs to ELSEVIER SCI LTD,ENGLAND
Keywords: Linear mixture model; Mixed pixel; Variable endmember
Department/Centre: Division of Biological Sciences > Centre for Ecological Sciences
Division of Interdisciplinary Sciences > Center for Infrastructure, Sustainable Transportation and Urban Planning (CiSTUP)
Division of Interdisciplinary Sciences > Management Studies
Date Deposited: 22 Jan 2014 04:36
Last Modified: 22 Jan 2014 04:37
URI: http://eprints.iisc.ac.in/id/eprint/48216

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