An improved method based on a new wavelet transform for overlapped peak detection on Raman spectra

Minghui Liu; Zuoren Dong; Guofeng Xin; Yanguang Sun; Ronghui Qu

doi:10.1117/12.2500272

9 November 2018 An improved method based on a new wavelet transform for overlapped peak detection on Raman spectra

Minghui Liu, Zuoren Dong, Guofeng Xin, Yanguang Sun, Ronghui Qu

Proceedings Volume 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V; 108260R (2018) https://doi.org/10.1117/12.2500272
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

Peak detection is an important step in the chemical identification by Raman spectroscopy. At present, most peak detection methods have finite identification ability on overlapping peaks, especially for the spectrum measured by the portable spectrometer with low resolution. In this paper, an improved method is proposed that using continuous wavelet transform(CWT) peak detection method based on a new wavelet on the deconvolved Raman spectrum. The new wavelet has smaller linewidth and is more similar with the intrinsic line profile of Raman spectroscopy, Lorentz line profile. So it has advantages on overlapping peaks detection. The proposed method was evaluated by Raman spectrum of solid amino acid mixtures. The results show that it is better at detecting overlapping peaks than the other two wavelets.

Citation Download Citation

Minghui Liu, Zuoren Dong, Guofeng Xin, Yanguang Sun, and Ronghui Qu "An improved method based on a new wavelet transform for overlapped peak detection on Raman spectra ", Proc. SPIE 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V, 108260R (9 November 2018); https://doi.org/10.1117/12.2500272

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