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Proceedings Paper

Industrial defect discrimination applying infrared imaging spectroscopy and artificial neural networks
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Paper Abstract

A non-intrusive infrared sensor for the detection of spurious elements in an industrial raw material chain has been developed. The system is an extension to the whole near infrared range of the spectrum of a previously designed system based on the Vis-NIR range (400 - 1000 nm). It incorporates a hyperspectral imaging spectrograph able to register simultaneously the NIR reflected spectrum of the material under study along all the points of an image line. The working material has been different tobacco leaf blends mixed with typical spurious elements of this field such as plastics, cardboards, etc. Spurious elements are discriminated automatically by an artificial neural network able to perform the classification with a high degree of accuracy. Due to the high amount of information involved in the process, Principal Component Analysis is first applied to perform data redundancy removal. By means of the extension to the whole NIR range of the spectrum, from 1000 to 2400 nm, the characterization of the material under test is highly improved. The developed technique could be applied to the classification and discrimination of other materials, and, as a consequence of its non-contact operation it is particularly suitable for food quality control.

Paper Details

Date Published: 17 March 2008
PDF: 8 pages
Proc. SPIE 6939, Thermosense XXX, 69390H (17 March 2008); doi: 10.1117/12.770279
Show Author Affiliations
Pilar Beatriz Garcia-Allende, Univ. de Cantabria (Spain)
Olga M. Conde, Univ. de Cantabria (Spain)
Francisco J. Madruga, Univ. de Cantabria (Spain)
Ana M. Cubillas, Univ. de Cantabria (Spain)
Jose M. Lopez-Higuera, Univ. de Cantabria (Spain)

Published in SPIE Proceedings Vol. 6939:
Thermosense XXX
Vladimir P. Vavilov; Douglas D. Burleigh, Editor(s)

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