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
- Laser & Optoelectronics Progress
- Vol. 57, Issue 3, 033001 (2020)
Fig. 1. Flow chart of improved iterative polynomial fitting method
Fig. 2. Simulation spectrum and the spectrum obtained with the proposed method for the first truncation of the peak
Fig. 3. Simulated spectrum and fitted baseline obtained with different methods
Fig. 4. Spectra after deducting the baseline
Fig. 5. RMSEs of different methods at different polynomial orders
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
Fig. 9. Spectra of ammonia after baseline correction with different methods
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Table 1. Simulation parameters of characteristic peak and baseline
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Table 2. RMSEs between the baseline-corrected spectrum and the original spectrum without baseline
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Table 3. Mean RMSE of different methods at different polynomial orders
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Table 4. Variance of signal after removing characteristic peak
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