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Proceedings Paper

Identifying fecal matter contamination in produce fields using multispectral reflectance imaging under ambient solar illumination
Author(s): Colm D. Everard; Moon S. Kim; Hoonsoo Lee; Colm P. O'Donnell
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Paper Abstract

An imaging device to detect fecal contamination in fresh produce fields could allow the producer avoid harvesting fecal contaminated produce. E.coli O157:H7 outbreaks have been associated with fecal contaminated leafy greens. In this study, in-field spectral profiles of bovine fecal matter, soil, and spinach leaves are compared. A common aperture imager designed with two identical monochromatic cameras, a beam splitter, and optical filters was used to simultaneously capture two-spectral images of leaves contaminated with both fecal matter and soil. The optical filters where 10 nm full width half maximum bandpass filters, one at 690 nm and the second at 710 nm. These were mounted in front of the object lenses. New images were created using the ratio of these two spectral images on a pixel by pixel basis. Image analysis results showed that the fecal matter contamination could be distinguished from soil and leaf on the ratio images. The use of this technology has potential to allow detection of fecal contamination in produce fields which can be a source of foodbourne illnesses. It has the added benefit of mitigating cross-contamination during harvesting and processing.

Paper Details

Date Published: 17 May 2016
PDF: 6 pages
Proc. SPIE 9864, Sensing for Agriculture and Food Quality and Safety VIII, 986416 (17 May 2016); doi: 10.1117/12.2229810
Show Author Affiliations
Colm D. Everard, USDA-ARS (United States)
Moon S. Kim, USDA-ARS (United States)
Hoonsoo Lee, USDA-ARS (United States)
Colm P. O'Donnell, Univ. College Dublin (Ireland)

Published in SPIE Proceedings Vol. 9864:
Sensing for Agriculture and Food Quality and Safety VIII
Moon S. Kim; Kuanglin Chao; Bryan A. Chin, Editor(s)

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