Naslov
Optimization of Filter Parameters in Wavelet Image Compression

Autori
Ravnjak, Mario ; Grgić, Mislav ; Kos, Tomislav

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings IWSSIP'99 6th International Workshop on Systems, Signals and Image Processing / Polec, Jaroslav ; Podhradsky, Pavol ; Rozinaj, Gregor - Bratislava : Slovak Telecommunications Users Group in FABER, 1999, 201-204

Skup
IWSSIP'99 6th International Workshop on Systems, Signals and Image Processing

Mjesto i datum
Bratislava, Slovačka, 02.06.1999. - 04.06.1999

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Image Compression; Wavelets; PSNR; JPEG

Sažetak
The aim of this work is to create a set of functions (filters) for implementation of wavelets in still image processing and to emphasize the advantage of this transformation relating to today's methods such is DCT. Here are given the samples and comparison of the most used filters and also comparison of quality for different image sizes. Filters taken in this test are: Haar filter (as the basis), orthogonal Daubechies' and Battle-Lemarie filters such is Least Asymmetric, Shannon and Coiflet, and symmetric Biorthogonal filter. Objective and subjective picture quality characteristics of images coded using wavelet transform with different filters are given. The comparison between JPEG coded picture and the same picture coded with wavelet transform is given. For higher compression ratios it is shown that wavelet transform has better S/N than JPEG.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA