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
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[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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