The method may further include performing {HEAD ~ a Fourier transform} on {TAIL ~ the windowed spectral image data} along the λ dimension, the Fourier transform performed at locations along the x dimension and the y dimension Fourier coefficients associated with each of the locations 
on
The method may further include performing { HEAD ~ a Fourier transform } on { TAIL ~ the windowed spectral image data } along the λ dimension , the Fourier transform performed at locations along the x dimension and the y dimension Fourier coefficients associated with each of the locations
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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 OTH OTH OTH OTH