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 plurality of intensity measurements associated with each spectral pixel corresponds to one characteristic peak measurement; identifying a subset of the spectral pixels, each of the spectral pixels in the subset including a spectral intensity that is greater than or equal to a threshold value, wherein the spectral intensity that is greater than or equal to the threshold value is associated with a 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 spectral pixels in the subset.