Predict CIE Lab from Vis-NIR reflectance spectra

Convenience wrapper: predict_xyz_from_spectra followed by the standard CIE Lab transform under D65 / 2-degree observer.

Usage

predict_lab_from_spectra(spectra, wavelengths)

Arguments

spectra

Reflectance values, in 0..1 or 0..100. A numeric vector (one sample), a numeric matrix (rows = samples, cols = wavelengths) or a data.frame.

wavelengths

Numeric vector of the wavelengths (in nm) corresponding to the columns of spectra. Must cover at least 400-700 nm; values outside 380-780 are ignored.

Value

A data.frame with columns L, a, b.