An Iterative Approach to Multisensor Sea Ice Classification
Characterizing the variability in sea ice in the polar regions is fundamental to an understanding of global climate and the geophysical processes which govern climate changes. Sea ice can be grouped into a number of general classes with different characteristics. Multisensor data from NSCAT, ERS-2,...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.30.334 http://polar.jpl.nasa.gov/Publications/remund_etal_TGARS00.pdf |
| Summary: | Characterizing the variability in sea ice in the polar regions is fundamental to an understanding of global climate and the geophysical processes which govern climate changes. Sea ice can be grouped into a number of general classes with different characteristics. Multisensor data from NSCAT, ERS-2, and SSM/I are reconstructed into enhanced resolution imagery for use in ice type classification. The resulting 12-dimensional data set is linearly transformed through principal component analysis to reduce data dimensionality and noise levels. An iterative statistical data segmentation algorithm is developed using maximum likelihood and maximum a posteriori techniques. For a given ice type, the conditional probability distributions of observed vectors are assumed to be Gaussian. The cluster centroids, covariance matrices, and a priori distributions are estimated from the classification of a previous temporal image set. An initial classification is produced using centroid training data and a . |
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