1. An imaging method comprising steps of: scanning a scene occupying at least a part of a field of view to obtain a plurality of standard quality sub-images of the scene, each standard quality sub-image of the plurality of standard quality sub-images covering less than the scene, the plurality of standard quality sub-images together covering the scene; and combining the plurality of standard quality sub-images into a first stitched image of the scene; wherein the step of scanning the scene is performed in a first spectral band with a scanner comprising folded optics.