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Destriping ("removing stripes") is cleanup processing of image data specifically to remove noise corresponding to streaks across the image, used to improve images and videos. Methods termed destriping are also used in efforts to create wide 2D images from images consisting of narrow strips: without some effort at destriping, the resulting image has streaks corresponding to where the narrow images were joined. In astronomy, it is used in creating familiar cosmic microwave background (CMB) maps (mapmaking), and naturally has use in any intensity mapping of the celestial sphere as well as planetary science (probes that orbit and image planets or moons, including Earth) and medical imaging. Regarding the assembly of CMB images, maximum likelihood mapmaking would be considered ideal but generally requires more computation than practical, and more efficient destriping methods are generally used.