Terahertz spectroscopy and imaging: A review on agricultural applications

Afsah‐Hejri, L.; Elnaz, Akbari; Toudeshki, Arash; Homayouni, Taymaz; Alizadeh, Azar; Ehsani, Reza

doi:10.1016/j.compag.2020.105628

Cited by 101 publications

(41 citation statements)

References 143 publications

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“…Therefore, THz imaging can be used as a complement to imaging technologies such as X‐ray and ultrasound. In addition to being used for the detection of foreign bodies in packaging, THz imaging is also comprehensively used for the detection of the moisture content, sugar content, adulteration, fungus infection, pesticide and antibiotic residues such as insecticides, fungicides, and harmful compounds in the agri‐food industry (Afsah‐Hejri et al., 2020; Di Girolamo et al., 2021; Zidane et al., 2020).…”

Section: Imaging Technologymentioning

confidence: 99%

Intelligent detection for fresh‐cut fruit and vegetable processing: Imaging technology

Tang

Zhang

Mujumdar

2022

Comp Rev Food Sci Food Safe

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Fresh-cut fruits and vegetables are healthy and convenient ready-to-eat foods, and the final quality is related to the raw materials and each step of the cutting unit. It is necessary to integrate suitable intelligent detection technologies into the production chain so as to inspect each operation to ensure high product quality. In this paper, several imaging technologies that can be applied online to the processing of fresh-cut products are reviewed, including: multispectral/hyperspectral imaging (M/HSI), fluorescence imaging (FI), X-ray imaging (XRI), ultrasonic imaging, thermal imaging (TI), magnetic resonance imaging (MRI), terahertz imaging, and microwave imaging (MWI). The principles, advantages, and limitations of these imaging technologies are critically summarized. The potential applications of these technologies in online quality control and detection during the fresh-cut processing are comprehensively discussed, including quality of raw materials, contamination of cutting equipment, foreign bodies mixed in the processing, browning and microorganisms of the cutting surface, quality/shelf-life evaluation, and so on. Finally, the challenges and future application prospects of imaging technology in industrialization are presented.

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Section: Imaging Technologymentioning

confidence: 99%

Intelligent detection for fresh‐cut fruit and vegetable processing: Imaging technology

Tang

Zhang

Mujumdar

2022

Comp Rev Food Sci Food Safe

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“…THz spectroscopy is adopted in various fields including agriculture, medicine, chemistry, astronomy, and meteorology. THz spectroscopy is favored for agricultural applications including water monitoring, pesticide monitoring, soil inspection, seed inspection, transgenics, and crop yield estimation [138]. In medical applications, THz can be used for the detection of avidin-biotin binding [139] and DNA hybridization [140].…”

Section: Integrated Thz Spectroscopymentioning

confidence: 99%

A review on applications of integrated terahertz systems

Venkatesh

Saeidi

2021

China Commun.

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A review on Terahertz end-to-end systems with an emphasis on integrated approaches is presented. Four major catalogs of THz integrated systems, including THz communication systems, THz imaging systems, THz radars, and THz spectroscopy systems, are reviewed in this article. The performance of integrated systems is compared with non-integrated solutions, followed by a discussion on the trend in future research avenues and applications.

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“…Compared with conventional techniques used for pesticide detection, THz spectroscopy imaging enables qualitative, quantitative, and graphical analysis. In recent years, there has been a significant interest in employing THz imaging for detection of pesticides [1,84,85]. Lee et al [86] proposed a novel high-sensitivity, selective method for detecting pesticide residues, where nano-scale metamaterials were used based on a THz-TDS system to detect methomyl.…”

Section: Pesticide Residues Detectionmentioning

confidence: 99%

“…The food and agriculture industries need fast and effective methods to inspect the quality and safety of agricultural products [1]. The THz region of the electromagnetic spectrum lies between the microwave (MW) and infrared (IR) regions with frequency range from 0.1 to 10 THz.…”

Section: Introductionmentioning

confidence: 99%

Applications of THz Spectral Imaging in the Detection of Agricultural Products

et al. 2021

Photonics

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Agricultural products need to be inspected for quality and safety, and the issue of safety of agricultural products caused by quality is frequently investigated. Safety testing should be carried out before agricultural products are consumed. The existing technologies for inspecting agricultural products are time-consuming and require complex operation, and there is motivation to develop a rapid, safe, and non-destructive inspection technology. In recent years, with the continuous progress of THz technology, THz spectral imaging, with the advantages of its unique characteristics, such as low energies, superior spatial resolution, and high sensitivity to water, has been recognized as an efficient and feasible identification tool, which has been widely used for the qualitative and quantitative analyses of agricultural production. In this paper, the current main performance achievements of the use of THz images are presented. In addition, recent advances in the application of THz spectral imaging technology for inspection of agricultural products are reviewed, including internal component detection, seed classification, pesticide residues detection, and foreign body and packaging inspection. Furthermore, machine learning methods applied in THz spectral imaging are discussed. Finally, the existing problems of THz spectral imaging technology are analyzed, and future research directions for THz spectral imaging technology are proposed. Recent rapid development of THz spectral imaging has demonstrated the advantages of THz radiation and its potential application in agricultural products. The rapid development of THz spectroscopic imaging combined with deep learning can be expected to have great potential for widespread application in the fields of agriculture and food engineering.

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Terahertz spectroscopy and imaging: A review on agricultural applications

Cited by 101 publications

References 143 publications

Intelligent detection for fresh‐cut fruit and vegetable processing: Imaging technology

Intelligent detection for fresh‐cut fruit and vegetable processing: Imaging technology

A review on applications of integrated terahertz systems

Applications of THz Spectral Imaging in the Detection of Agricultural Products

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