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Model-based classification of radar images

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3 Author(s)
Hung-Chih Chiang ; Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA ; Moses, R.L. ; Potter, L.C.

A Bayesian approach is presented for model-based classification of images with application to synthetic-aperture radar. Posterior probabilities are computed for candidate hypotheses using physical features estimated from sensor data along with features predicted from these hypotheses. The likelihood scoring allows propagation of uncertainty arising in both the sensor data and object models. The Bayesian classification, including the determination of a correspondence between unordered random features, is shown to be tractable, yielding a classification algorithm, a method for estimating error rates, and a tool for evaluating the performance sensitivity. The radar image features used for classification are point locations with an associated vector of physical attributes; the attributed features are adopted from a parametric model of high-frequency radar scattering. With the emergence of wideband sensor technology, these physical features expand interpretation of radar imagery to access the frequency- and aspect-dependent scattering information carried in the image phase

Published in:

Information Theory, IEEE Transactions on  (Volume:46 ,  Issue: 5 )

Date of Publication:

Aug 2000

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