Selection of spectral bands or filters for material classification under multiplexed illumination
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United States of America Patent
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Mar 28, 2017
Grant Date -
Jun 11, 2015
app pub date -
Jun 19, 2014
filing date -
Dec 6, 2013
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Abstract
Material classification using multiplexed illumination by broadband spectral light from multiple different incident angles, coupled with multi-spectral narrow band spectral measurement of light reflected from the illuminated object of unknown material, wherein selection of spectral bands for illumination or for narrow-band capture may comprise analysis of a database of labeled training material samples within a multi-class classification framework, captured using a relatively large number of spectral bands (such as 32 spectral bands), so as to select a subset of a relatively fewer number of spectral bands (such as 5 spectral bands), wherein the selected spectral bands in the subset retain a significant aptitude for distinguishing between different classifications of materials.
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