Abstract
Savitzky-Golay differentiation procedure is a commonly used pre-processing
technique in the near-infrared spectroscopy, being implemented in the instrumental
or specialized data processing software. However, the spectra can be recorded
linearly to the wavelength or energy scale depending on the available instrument,
which leads to different derivative curves obtained by the Savitzky-Golay approach.
The derivatives of the spectra linear to the wavelength scale tend to attenuate. A
modified procedure, which avoids this problem, is described and the aim of this note
is to bring this pre-processing alternative to the attention of the near-infrared
specialists.
© 2017 The Author(s)
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