Naslov
Picture Quality Measurements in Wavelet Compression System

Autori
Grgić, Sonja ; Grgić, Mislav ; Zovko-Cihlar, Branka

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

Izvornik
IBC99 Conference Publication / Nomen nescio - London : Delhi : International Broadcasting Convention, 1999, 554-559

Skup
IBC99 International Broadcasting Convention

Mjesto i datum
Amsterdam, Nizozemska, 10.09.1999. - 14.09.1999

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Discrete Wavelet Transform; Image Quality; Compression

Sažetak
The two-dimensional discrete wavelet transform (DWT) has become a standard tool in image compression applications because of their data reduction capabilities. In wavelet compression system the entire image is transformed and compressed as a single data object rather than block by block as in Discrete Cosine Transform (DCT) based compression system. It allows a uniform distribution of compression error across the entire image. DWT can provide better image quality than DCT especially on higher compression ratios. In this paper the extent to which the quality of image is degraded by process of wavelet compression and decompression is considered. Image quality is measured objectively using peak signal-to-noise ratio (PSNR) and subjectively using perceived image quality. The effects of different wavelet functions, image contents, image resolutions and compression ratios are assessed. The comparison with DCT based compression system for different image contents and compression ratios is presented.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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