대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)
- 대한전자공학회 2002년도 ITC-CSCC -2
- /
- Pages.1015-1018
- /
- 2002
The Fast Lifting Wavelet Transform for Image Coding
- Shin, Jonghong (School of Electronics, Electrical and Computer Engineering, Hongik University) ;
- Jee, InnHo (School of Electronics, Electrical and Computer Engineering, Hongik University)
- 발행 : 2002.07.01
초록
We show how any discrete wavelet transform or two band subband filtering with finite filters can be decomposed onto a finite sequence of simple filtering steps, which we call lifting steps but that are also known as ladder structures, We present a self-contained derivations, building the decomposition from the basic principles such as the Euclidean algorithm, with a focus on a applying it to wavelet filtering. This factorization provides an alternative for the lattice factorization, with the advantage that it can also be used in the bi-orthogonal, i.e, non-unitary case. Lifting leads to a speed-up when compared to the standard implementation. We show that this lifting scheme can be applied in image compression efficiently
키워드