A Laplacian pyramid is very similar to a Gaussian pyramid but usessaves the difference image of the blurred versions between each levels. Only the smallest level is not a [[Discretedifference Laplaceimage, operator|Laplacianto transform]]enable insteadreconstruction of athe Gaussianhigh resolution image using the difference images on higher levels. This technique can be used in [[image compression]].<ref>
Peter J. Burt and Edward H. Adelson.
[http://persci.mit.edu/pub_pdfs/pyramid83.pdf "The Laplacian Pyramid as a Compact Image Code"].
