1. A method of performing hyperspectral detection of a scene, comprising: capturing a digital context image of at least a portion of the scene over a field of regard (FoR); capturing a spectral image of the scene over an instantaneous field of view (iFoV) that falls within the FoR, and wherein the iFoV is less than half of the FoR; fusing the context image and the spectral image to form a fused image; panning the spectral image over the scene and within the FoR to capture one or more spectral signatures within the scene; and comparing the one or more spectral signatures to one or more reference spectral signatures and marking one or more locations of the one or more spectral signatures within the context image.