Cited by 210Remote Sensing in AgricultureSpectroscopy and Chemometric AnalysesSmart Agriculture and AI

HyperART: non-invasive quantification of leaf traits using hyperspectral absorption-reflectance-transmittance imaging

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Bergsträsser, Sergej, Fanourakis, Dimitrios, Schmittgen, Simone, Cendrero-Mateo, Maria, Jansen, Marcus, Scharr, Hanno, Rascher, Uwe·2015·Plant Methods

Abstract

BACKGROUND: Combined assessment of leaf reflectance and transmittance is currently limited to spot (point) measurements. This study introduces a tailor-made hyperspectral absorption-reflectance-transmittance imaging (HyperART) system, yielding a non-invasive determination of both reflectance and transmittance of the whole leaf. We addressed its applicability for analysing plant traits, i.e. assessing Cercospora beticola disease severity or leaf chlorophyll content. To test the accuracy of the obtained data, these were compared with reflectance and transmittance measurements of selected leaves acquired by the point spectroradiometer ASD FieldSpec, equipped with the FluoWat device. RESULTS: The working principle of the HyperART system relies on the upward redirection of transmitted and reflected light (range of 400 to 2500 nm) of a plant sample towards two line scanners. By using both the reflectance and transmittance image, an image of leaf absorption can be calculated. The comparison with the dynamically high-resolution ASD FieldSpec data showed good correlation, underlying the accuracy of the HyperART system. Our experiments showed that variation in both leaf chlorophyll content of four different crop species, due to different fertilization regimes during growth, and fungal symptoms on sugar beet leaves could be accurately estimated and monitored. The use of leaf reflectance and transmittance, as well as their sum (by which the non-absorbed radiation is calculated) obtained by the HyperART system gave considerably improved results in classification of Cercospora leaf spot disease and determination of chlorophyll content. CONCLUSIONS: The HyperART system offers the possibility for non-invasive and accurate mapping of leaf transmittance and absorption, significantly expanding the applicability of reflectance, based on mapping spectroscopy, in plant sciences. Therefore, the HyperART system may be readily employed for non-invasive determination of the spatio-temporal dynamics of various plant properties.

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  1. [19]Vedaldi A Fulkerson B VLFeat: an open and portable library of computer vision algorithms Proceedings of The International Conference on Multimedia 2010 Firenze, Italy ACM 1469 1472
  2. [37]Rouse JW, Haas RH, Schell JA, Deering DW. Monitoring Vegetation Systems in the Great Plains with ERTS, Third ERTS Symposium, NASA SP-351. 1973. p. 309–17.

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Authors
Bergsträsser, S., Fanourakis, D., Schmittgen, S., Cendrero-Mateo, M., Jansen, M., Scharr, H., & Rascher, U.
Affiliations
Forschungszentrum Jülich (DE)
Corresponding author
Bergsträsser, Sergej
Venue
Plant Methods
Published
2015
Volume
11
Issue
1
Pages
1
ISSN
1746-4811 (ISSN-L)
OpenAlex
W2160038364
Cited by
209
References
57
Citations by year
2026: 7 · 2025: 12 · 2024: 19 · 2023: 16 · 2022: 14 · 2021: 30 · 2020: 38 · 2019: 14 · 2018: 11 · 2017: 22 · 2016: 16 · 2015: 10
FWCI
17.83
Type
journal article
Language
en
Open access
Locations
  • Plant Methods (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • JuSER (Forschungszentrum Jülich) (submittedVersion, other-oa)
Funders
  • European Commission (284443)
  • Bundesministerium für Bildung und Forschung (315309)
  • European Regional Development Fund
Topics
  • Physical Sciences › Environmental Science › Ecology › Remote Sensing in Agriculture
  • Physical Sciences › Chemistry › Analytical Chemistry › Spectroscopy and Chemometric Analyses
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Smart Agriculture and AI
Keywords
hyperspectral imaging, leaf reflectance, leaf transmittance, leaf absorption, Cercospora beticola, chlorophyll content, plant disease severity, fertilization regimes, line scanner

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