swectral.vegeind.sipi#

swectral.vegeind.sipi(spec_array, wavelength, axis=0)[source]#

Compute SIPI (Structure Insensitive Pigment Index) of 2D array-like of 1D spectra data series. The calculation is based on:

Peñuelas,J. and Baret,F. and Filella,I.(1995)
Semi-empirical indices to assess carotenoids/chlorophyll a ratio from leaf spectral reflectance., (1995)
Photosynthetica, 31, (2), 221–230

Parameters:

spec_array2D array_like, shape (n_samples, n_features): 2D array-like of 1D spectral data series.
wavelength1D array_like: Wavelengths for the spectra data.
axisint, optional: Axis of spectral data series index, must be 0 or 1. If 0, each row represents a sample spectrum.

Returns:

pandas.DataFrame: Dataframe containing spectral indices of the samples.

Return type:

DataFrame