A deep learning method for predicting lead content in oilseed rape leaves using fluorescence hyperspectral imaging.

Abstract

The purpose of this study was to develop a deep learning method involving wavelet transform (WT) and stacked denoising autoencoder (SDAE) for extracting deep features of heavy metal lead (Pb) detection of oilseed rape leaves. Firstly, the standard normalized variable (SNV) algorithm was established as the best preprocessing algorithm, and the SNV-treated fluorescence spectral data was used for further data analysis. Then, WT was used to decompose the SNV-treated fluorescence spectra of oilseed rape leaves to obtain the optimal wavelet decomposition layers using different wavelet basis functions, and SDAE was used for deep feature learning under the optimal wavelet decomposition layer. Finally, the best established support vector machine regression (SVR) model prediction set parameters R p 2 , RMSEP and RPD were 0.9388, 0.0199 mg/kg and 3.275 using sym7 as the wavelet basis function. The results of this study verified that the huge potential of fluorescence hyperspectral technology combined with deep learning algorithms to detect heavy metals.

Plant phenotyping relevance

油糧菜葉の鉛含量という植物状態を蛍光ハイパースペクトル画像から推定する手法を、前処理・ウェーブレット変換・深層学習・回帰モデルとして開発し、性能評価しているため、植物フェノタイピング手法が中心である。

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