J. Qin, T. Burks, M. Ritenour, and W. Bonn. Journal of Food Engineering, 93 (2):
183 - 191(2009)Hyperspectral imaging in the visible light region.
Instead of using a wavelength selection and then doing something like LDA, they use "spectral information divergence" to compare spectra with a reference spectrum of canker; this is a similarity measure.
Possibly useful for our hyperspectral NIR camera. Also references to other methods that compare entire spectra, not just points at a few chosen wavelengths..