Title :
Evaluation of a quincunx wavelet filter design approach for quadtree-based embedded image coding
Author :
Van der Auwera, G. ; Munteanu, A. ; Cornelis, J.
Author_Institution :
ETRO/IRIS Res. Group, Vrije Univ., Brussels, Belgium
Abstract :
We study the compression performance of the quincunx discrete wavelet transform (DWT) and we compare it with the dyadic DWT in terms of rate-distortion. The 2D non-separable quincunx wavelet filters are designed by making use of the transformations of variables technique of Tay and Kingsbury (1993) starting from the 1D biorthogonal (9,7)-taps filters. The applied transformation functions are respectively based on the Kaiser and Chebyshev windows, and on the Lagrange halfband filters. The novelties of this work are in the evaluation of these filters for image compression and the usage of an embedded coder based on the quadtree approach for coding the quincunx subbands
Keywords :
data compression; discrete wavelet transforms; image coding; quadtrees; rate distortion theory; transform coding; two-dimensional digital filters; 2D nonseparable quincunx wavelet filters; Chebyshev windows; Kaiser windows; Lagrange halfband filters; discrete wavelet transform; dyadic DWT; image compression; quadtree-based embedded image coding; quincunx wavelet filter design; rate-distortion performance; subband coding; transformations of variables technique; Chebyshev approximation; Design methodology; Discrete wavelet transforms; Finite impulse response filter; Frequency; Image coding; Multidimensional systems; Nonlinear filters; Polynomials; Wavelet transforms;
Conference_Titel :
Image Processing, 2000. Proceedings. 2000 International Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-6297-7
DOI :
10.1109/ICIP.2000.899327
