The method may also include applying {HEAD ~ a window} to {TAIL ~ the spectral image data} along the λ dimension, the window configured to select a subset of the spectral image data corresponding to a range of wavelengths 
to
The method may also include applying { HEAD ~ a window } to { TAIL ~ the spectral image data } along the λ dimension , the window configured to select a subset of the spectral image data corresponding to a range of wavelengths
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH