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Ideal shrinking and expansion of discrete sequencesIdeal methods are described for shrinking or expanding a discrete sequence, image, or image sequence. The methods are ideal in the sense that they preserve the frequency spectrum of the input up to the Nyquist limit of the input or output, whichever is smaller. Fast implementations that make use of the discrete Fourier transform or the discrete Hartley transform are described. The techniques lead to a new multiresolution image pyramid.
Document ID
19880009716
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Watson, Andrew B. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1986
Subject Category
Mathematical And Computer Sciences (General)
Report/Patent Number
NAS 1.15:88202
NASA-TM-88202
A-86070
Accession Number
88N19100
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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