File:SavitskyGolaySmoothing.png
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Summary
[edit]This figure shows a noisy Raman spectrum of cyclohexane (spectrum A). The Savitsky-Golay smoothing filter is applied, resulting in spectrum B. As is shown the noise level, although not completely absent, is greatly reduced.
The parameters of the Savitsky-Golay algorithm (order of fitting polynomial and width of spectral window) may be altered to obtain better denoising. However, with higher orders of the polynomial , there is a greater risk of modelling the noise as well, and with greater window widths, there is also a greater risk of smoothing to much and introducing artifacts (such as negative peaks near the shoulders of cyclohexanes most intense peak).
See also
[edit]- SavitskyGolayDifferentiation.png
Licensing
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