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International Journal of Image, Graphics and Signal Processing(IJIGSP)

ISSN: 2074-9074 (Print), ISSN: 2074-9082 (Online)

Published By: MECS Press

IJIGSP Vol.6, No.7, Jun. 2014

A New Algorithm for Computationally Efficient Modified Dual Tree Complex Wavelet Transform

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Author(s)

SK.Umar Faruq, K.V.Ramanaiah, K.Soundara Rajan

Index Terms

DWT;DTCWT;MDTCWT;Hilbert transform;Quadrature filter;computational complexity

Abstract

We introduce a new generation functionally distinct redundant free Modified Dual Tree Complex Wavelet structure with improved orthogonality and symmetry properties. Traditional Dual Tree Complex Wavelets Transform (DTCWT), which incorporates two operationally similar, procedurally different Discrete Wavelet Transform (DWT) trees, is inherently redundant and computationally complex. In this paper, we propose Symmetrically Modified DTCWT (SMDTCWT) to explore the close relationships between the wavelet coefficients from the real and imaginary tree of the dual-tree CWT with an advent of a Quadrature Filter. This exploitation can reduce the level of redundancy that currently exists in a dual-tree wavelet system and decrease the computational complexity .Some of the primary constraints include that the designed algorithm should be satisfying the Hilbert transform pair condition and should have high coding gain, good directional sensitivity, and sufficient degree of regularity.

Cite This Paper

SK.Umar Faruq, K.V.Ramanaiah, K.Soundara Rajan,"A New Algorithm for Computationally Efficient Modified Dual Tree Complex Wavelet Transform", IJIGSP, vol.6, no.7, pp.44-52, 2014.DOI: 10.5815/ijigsp.2014.07.06

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