raman.FT_denoise

raman.FT_denoise(y, cutoff=1, filter='rect')

Apply a Fourier low pass filter to the data to remove high frequency noise.

Parameters:

• y (array) – Input spectrum. If y is a list or 2d-array of spectra, filter every spectrum.
• cutoff (int) – Low pass cutoff position taken from the high frequency side in array indices (0 means no filtering, default = 1).
• filter (str) –

  Type of step function to apply as filter. Currently supported are:

  • ‘cos2’ - A cosine squared.
  • ‘linear’ - A linear onset.
  • ‘rect’ - A rectangular step function (default).

Returns:

Filtered spectrum with same shape as y.