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