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Pyramid (image processing)
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<p>Pyramid, or pyramid representation, is a type of <a href="/facts/Scale_model/YgCtlwqb">multi-scale</a> <a href="/facts/Signal_(information_theory)/41YqUJ8c">signal</a> <a href="/facts/Knowledge_representation/9lnzyILD">representation</a> developed by the <a href="/facts/Computer_vision/Tl2Yyk66">computer vision</a>, <a href="/facts/Image_processing/zenalNCf">image processing</a> and <a href="/facts/Signal_processing/Npaja6zb">signal processing</a> communities, in which a signal or an image is subject to repeated <a href="/facts/Smoothing/2svFjsbI">smoothing</a> and <a href="/facts/Downsampling/gN5Wwrhv">subsampling</a>. Pyramid representation is a predecessor to <a href="/facts/Scale_space/XJNvTH1N">scale-space representation</a> and <a href="/facts/Multiresolution_analysis/yQtKJuNx">multiresolution analysis</a>. </p>