Method for nondestructive testing of grape berries based on near infrared spectrum technology
A near-infrared spectrum and detection method technology, applied in the field of rapid non-destructive testing, can solve problems such as difficulty in covering more spectral information, fewer wavelength points, narrow range, etc., to reduce model establishment and maintenance costs, and to achieve high accuracy of detection results , the effect of improving practicality
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[0050] Example 1
[0051] (1) Quantitative analysis
[0052] Take the "Xiahei" grape fruit mixed index model as an example, Figure 1A-1B Is the characteristic wavelength of the "Xia Hei" grape fruit sample set, from Figure 1A-1B It can be seen that the noise at both ends of the spectral curve is relatively large, and the spectral range automatically selected with the assistance of TQ software has two segments, respectively, 9842.89~8018.56cm -1 ( Figure 1A ) And 8014.71~4088.35cm -1 ( Figure 1B ). Through the analysis of the model correction effect of commonly used spectral preprocessing methods, multivariate scattering correction (MSC) + first derivative (1stderivative) + Norris smoothing is selected as the best preprocessing method for the "Xiahei" grape fruit model, and the evaluation of the modeling results It includes three parts: correlation coefficient, root mean square error and absolute error.
[0053] Correlation coefficient is divided into modeling set (Calibration) cor...
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