Watercore Identification of Xinjiang Fuji Apple Based on Manifold Learning Algorithm and Near Infrared Transmission Spectroscopy
GUO Jun-xian1, MA Yong-jie1, GUO Zhi-ming2, HUANG Hua3, SHI Yong1, ZHOU Jun1
1. College of Mechanical and Electronic Engineering, Xinjiang Agricultural University, Urumqi 830052, China
2. College of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
3. College of Mathematics and Physics, Xinjiang Agricultural University, Urumqi 830052, China
Abstract：Apple watercore occurs in many major apple producing areas, while there is no suitable way to sort apple type with watercore quickly. This research applies near infrared transmission spectroscopy, chemometric methods and manifold learning algorithm, selecting Xinjiang Red Fuji apple and watercore disease ones as samples, collecting near infrared transmission spectrum within 590 to 1 250 nm, spectroscopically corrected spectrum is used to do ten more speciesof spectral pretreatment. Firstly, full-wavelength pattern recognition is performed on the pre-processed spectral data to find out that multivariate scattering correction is the best pretreatment method. Then dataset preprocessed by multivariate scattering correction is used to make dimension reduction by using many other manifold learning algorithms such as Multidimensional Scaling, Stochastic Neighbor Embedding, Symmetric Stochastic Neighbor Embedding, t-Distributed Stochastic Neighbor Embedding, Laplacian Eigenmaps, Isomap, Landmark Isomap, Locally Linear Embedding, Diffusion Maps, combining Mahalanobis distance discrimination, quadratic discriminant analysis, K-nearest neighbor method to identify if watercore exist or not. Results indicate that an optimal identification model is obtained by using MSC-Landmark Isomap-KNN when principal components equal to twelve, and the identification rates for the calibration set and prediction set are 97.5% and 96.3% respectively. Hence, manifold learning algorithm and near infrared transmission spectroscopy technology can successfully realize the watercore identification of Xinjiang Red Fuji apple, which provides a theoretical basis for developing identification device in further research.
郭俊先，马永杰，郭志明，黄 华，史 勇，周 军. 流形学习方法及近红外透射光谱的新疆冰糖心红富士水心鉴别[J]. 光谱学与光谱分析, 2020, 40(08): 2415-2420.
GUO Jun-xian, MA Yong-jie, GUO Zhi-ming, HUANG Hua, SHI Yong, ZHOU Jun. Watercore Identification of Xinjiang Fuji Apple Based on Manifold Learning Algorithm and Near Infrared Transmission Spectroscopy. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2020, 40(08): 2415-2420.
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