1. A method of generating a spectrum of a cell, the method comprising: receiving a plurality of spectral pixels, each spectral pixel corresponding to a portion of a sample and being associated with a plurality of intensity measurements, each intensity measurement representing an intensity of light associated with a wavenumber, wherein one of the intensity measurements associated with each spectral pixel corresponds to one characteristic peak measurement; identifying a subset of the spectral pixels, at least one member of the subset being a pixel with a maximum spectral intensity, wherein the pixel with the maximum spectral intensity is a spectral pixel corresponding to a cell and having an associated characteristic peak measurement that is greater than or equal to a characteristic peak measurement associated with other spectral pixels corresponding to the cell; and forming a reconstructed cellular spectrum, the reconstructed cellular spectrum having a plurality of reconstructed measurements, each of the reconstructed measurements corresponding to a selected wavenumber, each of the reconstructed measurements being formed according to a sum of the intensity measurements associated with the selected wavenumber of the pixels in the subset.