Pregled bibliografske jedinice broj: 248010
On the statistical properties of the wavelet quantization noise
On the statistical properties of the wavelet quantization noise // Proceedings VIPromCom'99 / Grgić, Mislav (ur.).
Zadar: Hrvatsko društvo Elektronika u pomorstvu (ELMAR), 1999. str. 65-72 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
CROSBI ID: 248010 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
On the statistical properties of the wavelet quantization noise
Autori
Rimac-Drlje, Snježana ; Žagar, Drago
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Proceedings VIPromCom'99
/ Grgić, Mislav - Zadar : Hrvatsko društvo Elektronika u pomorstvu (ELMAR), 1999, 65-72
Skup
1st ELMAR International Workshop on Video Processing and Multimedia Communications, VIPromCom'99
Mjesto i datum
Zadar, Hrvatska, 23.06.1999. - 25.06.1999
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
Discrete wavelet transform; uniform quantization; quantization noise
Sažetak
The discrete wavelet transform has properties to effectively decorrelate and compact energy of digital images. With a quantization scheme based on the human visual characteristic and with an effective coding technique a high compression rate of images is possible. The probability density function (PDF) of the introduced quantization noise depends on the subbands wavelet coefficients statistics and quantization step q. The wavelet coefficients PDF corresponds well with a general Gauss law, and we show that parameter r of that law varies in wide range in dependence of the image contents, level of decomposition and the wavelet used. The quantization error PDF depends strongly on values of r, as well as on sigma/q ratio (sigma is a standard deviation of the wavelet coefficients), and for low r and low sigma/q error PDF is not uniform.
Izvorni jezik
Engleski
Znanstvena područja
Elektrotehnika, Računarstvo
POVEZANOST RADA
Projekti:
0165103 - Sustavi upravljanja i dijagnosticiranja sa smanjenom osjetljivošću na kvarove (Hocenski, Željko, MZOS ) ( CroRIS)
0165112 - Digitalna radiodifuzija u frekvencijskim opsezima ispod 30 MHz (Švedek, Tomislav, MZOS ) ( CroRIS)
Ustanove:
Fakultet elektrotehnike, računarstva i informacijskih tehnologija Osijek
