IEEE Trans Image Process - Robust through-the-wall radar image classification using a target-model alignment procedure.

Tópicos

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Resumo

A through-the-wall radar image (TWRI) bears little resemblance to the equivalent optical image, making it difficult to interpret. To maximize the intelligence that may be obtained, it is desirable to automate the classification of targets in the image to support human operators. This paper presents a technique for classifying stationary targets based on the high-range resolution profile (HRRP) extracted from 3-D TWRIs. The dependence of the image on the target location is discussed using a system point spread function (PSF) approach. It is shown that the position dependence will cause a classifier to fail, unless the image to be classified is aligned to a classifier-training location. A target image alignment technique based on deconvolution of the image with the system PSF is proposed. Comparison of the aligned target images with measured images shows the alignment process introducing normalized mean squared error (NMSE) = 9%. The HRRP extracted from aligned target images are classified using a naive Bayesian classifier supported by principal component analysis. The classifier is tested using a real TWRI of canonical targets behind a concrete wall and shown to obtain correct classification rates = 97%.

Resumo Limpo

throughthewal radar imag twri bear littl resembl equival optic imag make difficult interpret maxim intellig may obtain desir autom classif target imag support human oper paper present techniqu classifi stationari target base highrang resolut profil hrrp extract d twris depend imag target locat discuss use system point spread function psf approach shown posit depend will caus classifi fail unless imag classifi align classifiertrain locat target imag align techniqu base deconvolut imag system psf propos comparison align target imag measur imag show align process introduc normal mean squar error nmse hrrp extract align target imag classifi use naiv bayesian classifi support princip compon analysi classifi test use real twri canon target behind concret wall shown obtain correct classif rate

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