Inspection of fecal contamination on strawberries using line-scan LED-induced fluorescence imaging techniques

Yung Kun Chuang, Chun Chieh Yang, Moon S. Kim, Stephen R. Delwiche, Y. Martin Lo, Suming Chen, Diane E. Chan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the United States, fecal contamination of produce is a food safety issue associated with pathogens such as Escherichia coli and Salmonella that can easily pollute agricultural products via animal and human fecal matters. Outbreaks of foodborne illnesses associated with consuming raw fruits and vegetables in the US have occurred more frequently in recent years. This problem not only threatens public health, but also results in a huge amount of unnecessary economic losses every year. Therefore, developing optical sensing technologies for the detection of contaminants on fresh produce is urgent and essential. Among fruits, strawberry is one high-potential vector of fecal contamination and foodborne illnesses since the fruit is often consumed raw and with minimal processing. In the present study, line-scan LED-induced fluorescence imaging techniques were applied for inspection of fecal material on strawberries, and the spectral characteristics and specific wavebands of strawberries were determined by detection algorithms. The results indicated that the combination of two-waveband intensity ratios, such as 680 nm / 688 nm and 680 nm / 704 nm, can successfully distinguish fecal contamination, uncontaminated surfaces, and leaves. The binary images showed that the algorithm could successfully detect all of the fecal contamination spots that were applied to the strawberry surfaces. The results of this study would improve the safety and quality of produce consumed by the public.

Original languageEnglish
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2012, ASABE 2012
PublisherAmerican Society of Agricultural and Biological Engineers
Pages838-844
Number of pages7
Volume1
ISBN (Print)9781622762088
Publication statusPublished - 2012
Externally publishedYes
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2012 - Dallas, TX, United States
Duration: Jul 29 2012Aug 1 2012

Conference

ConferenceAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2012
CountryUnited States
CityDallas, TX
Period7/29/128/1/12

Keywords

  • Fecal contamination
  • Fluorescence imaging
  • Food safety
  • Strawberry

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Bioengineering

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  • Cite this

    Chuang, Y. K., Yang, C. C., Kim, M. S., Delwiche, S. R., Lo, Y. M., Chen, S., & Chan, D. E. (2012). Inspection of fecal contamination on strawberries using line-scan LED-induced fluorescence imaging techniques. In American Society of Agricultural and Biological Engineers Annual International Meeting 2012, ASABE 2012 (Vol. 1, pp. 838-844). American Society of Agricultural and Biological Engineers.