Ocean Optics SpecLine Offline Spectroscopy - Manual (Page 31)

A: Reference
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Wiener-Fourier filter
If you choose this filter type the spectral data is smoothed according to the method of the Wiener-Fourier
filter. The values for the frequency limit and the band width of the low-pass filter may be either set by the
user or set to standard values, which are extracted from the data automatically by SpecLine. The later is
recommended for a first run, where the extracted standard values will be displayed in the edit boxes and
can be changed if necessary.
If both filter types are selected, the Wiener-Fourier filter is applied first to the spectral data followed by
the polynomial filter.
Polynomial filter
According to the Savatzky-Golay technique, the polynomial order and the filter width must be specified
for the polynomial filter.
File List
In this dialog box all displayed spectra opened in one diagram window are listed. The file name of the
spectrum is displayed in the same color as the spectral curve.