Laser & Optoelectronics Progress, Volume. 57, Issue 3, 033001(2020)
Infrared Spectrum Baseline Correction Method Based on Improved Iterative Polynomial Fitting
Figures & Tables(13)
Fig. 2. Simulation spectrum and the spectrum obtained with the proposed method for the first truncation of the peak
Fig. 6. Original spectrum of trichloroethane and its fitted baselines obtained with different methods
Fig. 7. Spectra of trichloroethane after baseline correction with different methods
Fig. 8. Original spectrum of ammonia and its fitted baseline obtained with different methods
Table 1. Simulation parameters of characteristic peak and baseline
View tableTable 1. Simulation parameters of characteristic peak and baseline
Type a b c 1 1 35 5 2 2 100 10 3 1 140 50
Table 2. RMSEs between the baseline-corrected spectrum and the original spectrum without baseline
View tableTable 2. RMSEs between the baseline-corrected spectrum and the original spectrum without baseline
Method RMSE PF 0.5081 IPF 0.1694 BDM 0.1258 Proposed 0.0539
Table 3. Mean RMSE of different methods at different polynomial orders
View tableTable 3. Mean RMSE of different methods at different polynomial orders
Method Mean RMSE PF 0.5951 IPF 0.3492 BDM 0.3446 Proposed 0.1108
Table 4. Variance of signal after removing characteristic peak
View tableTable 4. Variance of signal after removing characteristic peak
Method Variance /10-4 Trichloroethane Ammonia PF 48.2 40 IPF 11.2 48 BDM 7.7 40 Proposed 4.5 39
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Zhiqiang Ning, Jiaxiang Liu, Yue Wu, Mengqi Tao, Yonghua Fang. Infrared Spectrum Baseline Correction Method Based on Improved Iterative Polynomial Fitting[J]. Laser & Optoelectronics Progress, 2020, 57(3): 033001
Paper Information
Category: Spectroscopy
Received: Jul. 11, 2019
Accepted: Aug. 12, 2019
Published Online: Feb. 17, 2020
The Author Email: Fang Yonghua (yhfang@aiofm.ac.cn)
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