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| pages = 20–51
|date=May 1981
}}</ref><ref name=Crowley1981>{{Cite journal |last=Crowley |first=James L. |title=A representation for visual information |publisher=Carnegie-Mellon University, Robotics Institute |date=November 1981 |id=tech. report CMU-RI-TR-82-07 |url=http://www.ri.cmu.edu/publication_view.html?pub_id=37}}</ref><ref>{{cite journal | last1 = Burt | first1 = Peter | last2 = Adelson | first2 = Ted | year = 1983 | title = The Laplacian Pyramid as a Compact Image Code | url = http://persci.mit.edu/pub_pdfs/pyramid83.pdf| journal = IEEE Trans. Commun. | volume = 9 | issue = 4| pages = 532–540 | doi = 10.1109/TCOM.1983.1095851 | citeseerx = 10.1.1.54.299 | s2cid = 8018433 }}</ref><ref>{{Cite journal
| last1 = Crowley | first1 = J. L.
| last2 = Parker | first2 = A. C. | author2-link = Alice C. Parker
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===Laplacian pyramid===
A Laplacian pyramid is very similar to a Gaussian pyramid but saves the difference image of the blurred versions between each levels. Only the smallest level is not a difference image to enable reconstruction of the high resolution image using the difference images on higher levels. This technique can be used in [[image compression]].<ref>{{cite journal | last1 = Burt | first1 = Peter J. | last2 = Adelson | first2 = Edward H. | year = 1983 | title = The Laplacian Pyramid as a Compact Image Code | url = http://persci.mit.edu/pub_pdfs/pyramid83.pdf | journal = IEEE Transactions on Communications | volume = 31| issue = 4| pages = 532–540| doi = 10.1109/TCOM.1983.1095851 | citeseerx = 10.1.1.54.299 | s2cid = 8018433 }}</ref>
===Steerable pyramid===
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