Research Papers

Evolving spectral transformations for multitemporal information extraction using evolutionary computation

[+] Author Affiliations
Henrique Momm

The University of Mississippi, Department of Geology and Geological Engineering, 120 Carrier Hall, University, Mississippi 38677

Greg Easson

The University of Mississippi, Mississippi Mineral Resources Institute, 120 Carrier Hall, University, Mississippi 38677

J. Appl. Remote Sens. 5(1), 053564 (November 16, 2011). doi:10.1117/1.3662089
History: Received March 12, 2011; Revised October 19, 2011; Accepted October 21, 2011; Published November 16, 2011; Online November 16, 2011
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Remote sensing plays an important role in assessing temporal changes in land features. The challenge often resides in the conversion of large quantities of raw data into actionable information in a timely and cost-effective fashion. To address this issue, research was undertaken to develop an innovative methodology integrating biologically-inspired algorithms with standard image classification algorithms to improve information extraction from multitemporal imagery. Genetic programming was used as the optimization engine to evolve feature-specific candidate solutions in the form of nonlinear mathematical expressions of the image spectral channels (spectral indices). The temporal generalization capability of the proposed system was evaluated by addressing the task of building rooftop identification from a set of images acquired at different dates in a cross-validation approach. The proposed system generates robust solutions (kappa values > 0.75 for stage 1 and > 0.4 for stage 2) despite the statistical differences between the scenes caused by land use and land cover changes coupled with variable environmental conditions, and the lack of radiometric calibration between images. Based on our results, the use of nonlinear spectral indices enhanced the spectral differences between features improving the clustering capability of standard classifiers and providing an alternative solution for multitemporal information extraction.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Henrique Momm and Greg Easson
"Evolving spectral transformations for multitemporal information extraction using evolutionary computation", J. Appl. Remote Sens. 5(1), 053564 (November 16, 2011). ; http://dx.doi.org/10.1117/1.3662089


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