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- Title
Internal defect scanning of sweetpotatoes using interactance spectroscopy.
- Authors
Kudenov, Michael W.; Scarboro, Clifton G.; Altaqui, Ali; Boyette, Mike; Yencho, G. Craig; Williams, Cranos M.
- Abstract
While standard visible-light imaging offers a fast and inexpensive means of quality analysis of horticultural products, it is generally limited to measuring superficial (surface) defects. Using light at longer (near-infrared) or shorter (X-ray) wavelengths enables the detection of superficial tissue bruising and density defects, respectively; however, it does not enable the optical absorption and scattering properties of sub-dermal tissue to be quantified. This paper applies visible and near-infrared interactance spectroscopy to detect internal necrosis in sweetpotatoes and develops a Zemax scattering simulation that models the measured optical signatures for both healthy and necrotic tissue. This study demonstrates that interactance spectroscopy can detect the unique near-infrared optical signatures of necrotic tissues in sweetpotatoes down to a depth of approximately 5±0.5 mm. We anticipate that light scattering measurement methods will represent a significant improvement over the current destructive analysis methods used to assay for internal defects in sweetpotatoes.
- Subjects
SPECTRUM analysis; LIGHT absorption; LIGHT scattering; HORTICULTURAL products; PHOTOMETRY; INFRARED absorption
- Publication
PLoS ONE, 2021, Vol 16, Issue 2, p1
- ISSN
1932-6203
- Publication type
Article
- DOI
10.1371/journal.pone.0246872