A Non-destructive Terahertz Spectroscopy-Based Method for Transgenic Rice Seed Discrimination via Sparse Representation

文献类型： 外文期刊

第一作者： Hu, Xiaohua

作者： Hu, Xiaohua;Zheng, Lei;Hu, Xiaohua;Lang, Wenhui;Liu, Wei;Xu, Xue;Yang, Jianbo

作者机构：

关键词： Transgenic;Terahertz;Non-destructive;Sparse representation

期刊名称：JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES （ 影响因子：1.768； 五年影响因子：1.876 ）

ISSN： 1866-6892

年卷期： 2017 年 38 卷 8 期

页码：

收录情况： SCI

摘要： Terahertz (THz) spectroscopy technique has been researched and developed for rapid and non-destructive detection of food safety and quality due to its low-energy and non-ionizing characteristics. The objective of this study was to develop a flexible identification model to discriminate transgenic and non-transgenic rice seeds based on terahertz (THz) spectroscopy. To extract THz spectral features and reduce the feature dimension, sparse representation (SR) is employed in this work. A sufficient sparsity level is selected to train the sparse coding of the THz data, and the random forest (RF) method is then applied to obtain a discrimination model. The results show that there exist differences between transgenic and non-transgenic rice seeds in THz spectral band and, comparing with Least squares support vector machines (LS-SVM) method, SR-RF is a better model for discrimination (accuracy is 95% in prediction set, 100% in calibration set, respectively). The conclusion is that SR may be more useful in the application of THz spectroscopy to reduce dimension and the SR-RF provides a new, effective, and flexible method for detection and identification of transgenic and non-transgenic rice seeds with THz spectral system.

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