Multi-Temporal Satellite Image Analysis Using Gene Expression Programming
This paper discusses an approach for river mapping and flood evaluation to aid multi-temporal time series analysis of satellite images utilizing pixel spectral information for image classification and region-based segmentation to extract water covered region. Analysis of Moderate Resolution Imaging Spectroradiometer (MODIS) satellite images is applied in two stages: before flood and during flood. For these images the extraction of water region utilizes spectral information for image classification and spatial information for image segmentation. Multi-temporal MODIS images from “normal” (non-flood) and flood time-periods are processed in two steps. In the first step, image classifiers such as artificial neural networks and gene expression programming to separate the image pixels into water and non-water groups based on their spectral features. The classified image is then segmented using spatial features of the water pixels to remove the misclassified water region. From the results obtained, we evaluate the performance of the method and conclude that the use of image classification and region-based segmentation is an accurate and reliable for the extraction of water-covered region.
KeywordsMODIS satellite image Gene expression programming Artificial neural network
This work is supported by the Space Technology Cell, Indian Institute of Science, Bangalore and Indian Space Research Organization (ISRO). We also acknowledge the MODIS mission scientists and associated NASA personnel for the production of the remote sensing data which is used in this paper.
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