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

Roberto Romaniello, Giorgio Peri, Alessandro Leone
2016 Journal of Agricultural Engineering  
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
more » ... 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.
doi:10.4081/jae.2016.491 fatcat:zljmkqpd3jcfbp3uc2pr6khw2a