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Sensors 2017, 17(3), 518;

A Pulsed Thermographic Imaging System for Detection and Identification of Cotton Foreign Matter

Institute for Artificial Intelligence, University of Georgia, Athens, GA 30602, USA
College of Engineering, University of Georgia, Athens, GA 30602, USA
Author to whom correspondence should be addressed.
Academic Editor: Piervincenzo Rizzo
Received: 29 December 2016 / Revised: 22 February 2017 / Accepted: 2 March 2017 / Published: 4 March 2017
(This article belongs to the Section Physical Sensors)
Full-Text   |   PDF [3499 KB, uploaded 4 March 2017]   |  


Detection of foreign matter in cleaned cotton is instrumental to accurately grading cotton quality, which in turn impacts the marketability of the cotton. Current grading systems return estimates of the amount of foreign matter present, but provide no information about the identity of the contaminants. This paper explores the use of pulsed thermographic analysis to detect and identify cotton foreign matter. The design and implementation of a pulsed thermographic analysis system is described. A sample set of 240 foreign matter and cotton lint samples were collected. Hand-crafted waveform features and frequency-domain features were extracted and analyzed for statistical significance. Classification was performed on these features using linear discriminant analysis and support vector machines. Using waveform features and support vector machine classifiers, detection of cotton foreign matter was performed with 99.17% accuracy. Using frequency-domain features and linear discriminant analysis, identification was performed with 90.00% accuracy. These results demonstrate that pulsed thermographic imaging analysis produces data which is of significant utility for the detection and identification of cotton foreign matter. View Full-Text
Keywords: cotton foreign matter; thermography; pulse-phase thermography cotton foreign matter; thermography; pulse-phase thermography

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Kuzy, J.; Li, C. A Pulsed Thermographic Imaging System for Detection and Identification of Cotton Foreign Matter. Sensors 2017, 17, 518.

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