Whereas hyperspectral imaging acquires data as many contiguous spectral bands, full spectral imaging acquires data as spectral curves.  A significant advantage of FSI over hyperspectral imaging is a significant reduction in data rate and volume.  FSI extracts and saves only the information that is in the raw data.  The information is contained in the shape of the spectral curves.  The rate at which data is produced by an FSI system is proportional to the amount of information in the scene/image.