Wavelet compression is performed on {TAIL ~ the filtered data} along the x dimension and {HEAD ~ the y dimension} to generate the compressed spectral image 
Wavelet compression is performed on { TAIL ~ the filtered data } along the x dimension and { HEAD ~ the y dimension } to generate the compressed spectral image
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH