Chemical Images are made up of hundreds of contiguous
wavebands for each spatial position of a target studied.
Consequently, each pixel in a Chemical Image contains the
spectrum of that specific position. The resulting spectrum
acts like a fingerprint, which can be used to characterise
the composition of that particular pixel. Chemical Images,
known as hypercubes, are three-dimensional blocks of data,
comprising of two spatial and one wavelength dimension,
as illustrated in Fig. 1. The hypercube allows for the visualisation
of biochemical constituents of a sample, separated
into particular areas of the image, since regions of a sample
with similar spectral properties have similar chemical
composition.