spliceCorrection: Splice correction of a spectral matrix acquired with an ASD...

In prospectr: Miscellaneous Functions for Processing and Sample Selection of Spectroscopic Data

Splice correction of a spectral matrix acquired with an ASD spectrometer

Description

Corrects steps in an input spectral matrix by linear interpolation of the values of the edges of the middle sensor

Usage

spliceCorrection(X, wav, splice = c(1000, 1830), interpol.bands = 10)

Arguments

X	a numeric matrix or vector to transform (optionally a data frame that can be coerced to a numerical matrix).
wav	a numeric vector with band positions.
splice	a numeric vector of length 1 or 2 with the positions of the splice(s). Default: c(1000, 1830) (as for the ASD FieldSpec Pro spectrometer of Malvern Panalytical). See details.
interpol.bands	the number of interpolation bands.

Details

This function uses by default the positions for the ASD FieldSpec Pro spectroradiometer (Malvern Panalytical) which usually exhibit steps at the splice of the three built-in detectors, positioned at 1000 nm (end of VNIR detector) and 1830 nm (end of SWIR1 detector). The data corresponding to the spectral region after the first step is used as reference for correcting the first region and the laste region (if 2 steps are supplied). Other typical examples of splice artifacts caused by concatenating data captured by different detectors inside the spectrometer:

• XDS (FOSS): 1100 nm

• ProxiMate (BUCHI Labortechnik): 900 nm

Value

a matrix with the splice corrected data.

Author(s)

Antoine Stevens and Leonardo Ramirez-Lopez

prospectr documentation built on June 22, 2024, 11:08 a.m.