For applications where colorimetric information is insufficient to characterize an input scene or document, multispectral image capture (
Peter D. Burns, Roy S. Berns, "Quantization in Multispectral Color Image Acquisition" in Proc. IS&T 7th Color and Imaging Conf., 1999, pp 32 - 35, https://doi.org/10.2352/CIC.1999.7.1.art00007