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Author Shenqiu Zhang ♦ Moloney, C.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2008
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science ♦ Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics
Subject Keyword Wavelet transforms ♦ Filter bank ♦ Discrete wavelet transforms ♦ Image representation ♦ Image reconstruction ♦ Image sampling ♦ Spatial resolution ♦ Image resolution ♦ Laplace equations ♦ Pixel ♦ multiresolution ♦ wavelet transform. ♦ Wavelet transforms ♦ critical sampling ♦ perfect reconstruction ♦ image representations
Abstract The 2-directional wavelet transform is an image representation which separates the spectrum of an image into a lowpass subband, a horizontal highpass subband and a vertical high-pass subband. Each of the decomposed highpass subbands, corresponding to pairwise trapezoidal regions of the spectrum of an original image, is critically sampled to a rectangular shaped coefficient image in the spatial domain. This paper illustrates how an innovative method can be generated by the creative combination of filter banks, integer resampling, and frequency shifting. The proposed 2-directional wavelet transform achieves critical sampling and perfect reconstruction properties. The new transform is an extension of the traditional wavelet transform, and is also the fundamental stage of a new method called the nonredundant contourlet transform (NRCT) developed in a companion paper. Experimental results are presented to demonstrate the potential of the 2- directional wavelet transform.
Description Author affiliation: Electr. & Comput. Eng., Memorial Univ. of Newfoundland, St. John's, NL (Shenqiu Zhang; Moloney, C.)
ISBN 9781424416424
ISSN 08407789
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2008-05-04
Publisher Place Canada
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 223.15 kB
Page Count 4
Starting Page 001313
Ending Page 001316


Source: IEEE Xplore Digital Library