Title :
Signal-adapted multiresolution transform for image coding
Author :
Desarte, P. ; Macq, B. ; Slock, D.T.M.
Author_Institution :
Univ. Catholique de Louvain, Belgium
fDate :
3/1/1992 12:00:00 AM
Abstract :
The authors consider the problem of designing multiresolution transforms that are adapted to the given image signal, in the sense that they maximize the coding gain at each resolution level. A simple alternating optimization algorithm is derived for solving this problem in the framework of the lattice realization of para-unitary quadrature mirror filters. The resulting large coding scheme is discussed in some detail, and its performance is compared with that of the discrete cosine transform (JPEG) technique and with that of some nonadapted multiresolution transforms.<>
Keywords :
data compression; encoding; filtering and prediction theory; picture processing; transforms; alternating optimization algorithm; image coding; lattice realization; multiresolution transform; para-unitary quadrature mirror filters; signal adapted transform; wavelet transforms; Discrete cosine transforms; Discrete transforms; Discrete wavelet transforms; Filters; Frequency; Image coding; Image resolution; Lattices; Signal resolution; Spatial resolution;
Journal_Title :
Information Theory, IEEE Transactions on
