Recognition of Small-Sample Terahertz Spectrum

Cui Xiangwei; Shen Tao; Liu Yingli; Zhu Yan; Zhu Rongsheng

doi:10.3788/LOP202158.0130001

Laser & Optoelectronics Progress, Volume. 58, Issue 1, 130001(2021)

Recognition of Small-Sample Terahertz Spectrum

Cui Xiangwei^1,2, Shen Tao^1,2、*, Liu Yingli^1,2, Zhu Yan^1,2, and Zhu Rongsheng^1,2

¹Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, Yunnan 650504, China

²Computer Technology Application Key Lab of Yunnan Province, Kunming University of Science and Technology, Kunming, Yunnan 650504, China

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Figures & Tables(8)

Fig. 1. Network structure of GAN

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Fig. 2. Network model of DNN

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Fig. 3. THz spectral curves of riboflavin before and after S-G filtering. (a) Before filtering; (b) after filtering

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Fig. 4. Comparison before and after data preprocessing. (a)?(c) Before preprocessing; (d)?(f) after preprocessing

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Fig. 5. THz spectra of 10 substances

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Fig. 6. Data graphs generated by GAN under different iterations. (a) Original spectral data graph; (b) data graph generated by 1000 iterations; (c) data graph generated by 5000 iterations; (d) data graph generated by 10000 iterations; (e) data graph generated by 100000 iterations; (f) data graph generated by 200000 iterations

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Table 1. Comparison of sample size between original and extended data sets
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Table 1. Comparison of sample size between original and extended data sets
Data set Sample size
Dataset-1 100
Dataset-2 100
Dataset-3 200
Augmented dataset-1 5000
Augmented dataset-2 5000
Augmented dataset-3 10000

Table 2. Recognition accuracy rate of different classifiers

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Table 2. Recognition accuracy rate of different classifiers

Classifier	Accuracy /％
Classifier	SVM	LSTM	DNN
Dataset-1	90.25	91.34	93.26
Augmented dataset-1	91.17	93.35	97.89
Dataset-2	85.15	86.16	91.12
Augmented dataset-2	89.12	91.64	94.35
Dataset-3	86.23	87.64	92.14
Augmented dataset-3	89.86	92.12	94.87

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Cui Xiangwei, Shen Tao, Liu Yingli, Zhu Yan, Zhu Rongsheng. Recognition of Small-Sample Terahertz Spectrum[J]. Laser & Optoelectronics Progress, 2021, 58(1): 130001

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