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{{Short description|Type of multi-scale signal representation}}
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[[File:image pyramid.svg|thumb|upright=1.2|Visual representation of an image pyramid with 5 levels]]
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'''Pyramid''', or '''pyramid representation''', is a type of [[Scale model|multi-scale]] [[Signal (information theory)|signal]] [[Knowledge representation|representation]] developed by the [[computer vision]], [[image processing]] and [[signal processing]] communities, in which a signal or an image is subject to repeated [[smoothing]] and [[Downsampling|subsampling]]. Pyramid representation is a predecessor to [[scale space|scale-space representation]] and [[multiresolution analysis]].
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