Title :
Minimizing ringing effect on images coded at low bit rates with wavelets
Author :
Rodrigues, Marco A M ; da Silva, Eduardo A B ; Diniz, Paulo S R
Author_Institution :
Centro de Pesquisas de Energia Eletrica, Rio de Janeiro, Brazil
Abstract :
When designing wavelet transforms for subband coding systems, a problem of concern is to avoid ringing effects in the compressed images. We developed a technique to minimize this effect which enables for coding gain optimization. We design wavelets without sidelobes, a condition which is obtained when certain constraints are met. We compare our results to some previously published wavelets
Keywords :
FIR filters; channel bank filters; circuit optimisation; filtering theory; high-pass filters; image coding; linear phase filters; low-pass filters; minimisation; transform coding; wavelet transforms; coding gain optimization; compressed images; filter design; high pass filter; image coding; linear-phase FIR filter; low bit rates; low pass filter; ringing effect minimisation; subband coding systems; wavelet transforms design; Bit rate; Damping; Filter bank; Finite impulse response filter; Image coding; Image processing; Nonlinear filters; Quantization; Tail; Wavelet transforms;
Conference_Titel :
Image Processing, 1998. ICIP 98. Proceedings. 1998 International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-8186-8821-1
DOI :
10.1109/ICIP.1998.727349
