Method for detecting pesticide residue on surface of navel orange based on hyperspectral imaging technology

A pesticide residue, hyperspectral imaging technology, applied in the field of pesticide residue detection, can solve problems such as environmental pollution, and achieve the effect of reducing environmental pollution, saving time, and not polluting the environment

Active Publication Date: 2014-03-12
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the invention can be widely used in the micro-trace detection of organophosphorus pesticide residues, the reagents used will pollute the environment

Method used

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  • Method for detecting pesticide residue on surface of navel orange based on hyperspectral imaging technology
  • Method for detecting pesticide residue on surface of navel orange based on hyperspectral imaging technology
  • Method for detecting pesticide residue on surface of navel orange based on hyperspectral imaging technology

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Experimental program
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Embodiment 1

[0036] (1) Establish the relationship between gray value and reflectivity of single-band spectral image

[0037] 1-a. Collect the reference single-band spectral images of three diffuse reflectance standard plates at eleven characteristic wavelengths (each diffuse reflectance standard plate collects a reference single-band spectral image at each characteristic wavelength), and obtain each The gray value of a reference single-band image.

[0038] In the entire visible and near-infrared spectrum, the diffuse reflection standard plate used corresponds to the reflectivity of 99%, 75%, and 2%, such as figure 1 As shown, the diffuse reflections of the three diffuse reflection standard plates in the entire visible and near-infrared spectral range are different from each other. For each diffuse reflection standard plate, the reflectivity at all wavelengths is the same.

[0039] 1-b. For each characteristic wavelength, linearly fit the gray value of the corresponding reference single-band imag...

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Abstract

The invention discloses a method for detecting pesticide residue on the surface of a navel orange based on a hyperspectral imaging technology. The method comprises the following steps: (1) collecting single-band spectral images of a to-be-detected navel orange at 11 characteristic wavelengths, wherein the 11 characteristic wavelengths respectively are 410nm, 431nm, 520nm, 637nm, 680nm, 690nm, 784nm, 880nm, 950nm, 967nm and 1020nm; (2) transforming the single-band spectral images in the step (1) into reflectivity images according to the linear relation of the grey value and the reflectivity of the single-band spectral images; and (3) calculating according to the formula so as to obtain the pesticide residue corresponding to each pixel point in the reflectivity images of the navel orange. The method can be used for detecting the distribution of the pesticide residue on the surface of the navel orange and is high in detection accuracy and short in detection time, and not only is the environmental pollution alleviated, but also the detection cost is also reduced.

Description

Technical field [0001] The invention relates to the field of pesticide residue detection, in particular to a method for detecting pesticide residue on the surface of navel orange based on hyperspectral imaging technology. Background technique [0002] Pesticide residues on the surface of fruits and vegetables not only endanger the health of consumers, but also affect the export trade of fruits and vegetables. Although there are many mature and feasible methods for detecting pesticide residues on the surfaces of fruits and vegetables, most of these methods in the existing technology are not only The operation speed is relatively slow, and they are all destructive tests. [0003] For example, the invention with application publication number CN 103076319A discloses a method for detecting the toxicity of pesticide residues in fruits and vegetables, including: preparation of luminescent bacteria, preparation of test samples, and luminescence detection of luminescent bacteria, combining...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25
Inventor 章海亮何勇
Owner ZHEJIANG UNIV
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