1. A method for spectral imaging, the method comprising: capturing high spectral resolution data of at least a first portion of a first scene using a first plurality of channels; determining a first set of channels from a second plurality of channels which can reconstruct spectra of the first portion of the first scene to satisfy a first error criterion when compared with the captured high spectral resolution data; and, capturing pixel data of the at least a second portion of at least the first scene using the first set of channels.