Fluorescence hyper-spectral imaging to detecting faecal contamination on fresh tomatoes

  • Roberto Romaniello | roberto.romaniello@unifg.it Department of the Science of Agriculture, Food and Environment, University of Foggia, Italy.
  • Giorgio Peri Department of the Science of Agriculture, Food and Environment, University of Foggia, Italy.
  • Alessandro Leone Department of the Science of Agriculture, Food and Environment, University of Foggia, Italy.

Abstract

Faecal contamination of fresh fruits represents a severe danger for human health. Thus some techniques based on microbiological testing were developed to individuate faecal contaminants but those tests do not results efficient because their non-applicability on overall vegetable unity. In this work a methodology based on hyper-spectral fluorescence imaging was developed and tested to detecting faecal contamination on fresh tomatoes. Two image-processing methods were performed to maximise the contrast between the faecal contaminant and tomatoes skin: principal component analysis and band image ratio (BRI). The BRI method allows classifying correctly 70% of contaminated area, with no false-positives in all examined cases. Thus, the developed methodology can be employed for a fast and effective detection of faecal contamination on fresh tomatoes.

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Published
2016-03-08
Section
Original Articles
Keywords:
Hyperspectral imaging, faecal contamination, tomatoes.
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How to Cite
Romaniello, R., Peri, G., & Leone, A. (2016). Fluorescence hyper-spectral imaging to detecting faecal contamination on fresh tomatoes. Journal of Agricultural Engineering, 47(1), 7-11. https://doi.org/10.4081/jae.2016.491