By comparing the regression results of each denoising method with the RMSE c , R c 2 , RMSE p , and R p 2 values in Table 1 , it was found that DWT and OD showed a trend of decreasing prediction accuracy, while the other preprocessing methods did not significantly improve the prediction accuracy. 3.3.
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Design and Experiment of a Portable Near-Infrared Spectroscopy Device for Convenient Prediction of Leaf Chlorophyll Content.
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