Naslov
Prefiltering and reconstruction filters in the volume rendering

Autori
Goluban, Alan ; Mihajlović, Željka ; Budin, Leo

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

Izvornik
Proceedings of the 10th Mediterranean Electrotechnical Conference / Pattichis, Constantinos S. ; Panis, Stathis - Nikozija : Violaris Press Ltd, 2000, 558-561

Skup
10th Mediterranean Electrotechnical Conference

Mjesto i datum
Limassol, Cipar, 29.05.2000. - 31.05.2000

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
interpolation; volume reconstruction; prefiltering; visualization

Sažetak
This paper deals with reconstruction filters and appropriate prefiltering techniques in the volume rendering. Sampling, resampling and reconstruction of continuous functions are used in many different fields. To satisfy conditions of Shannon theorem, prefiltering of images or data volumes is usually required before sampling. Usual approach is to use Gaussian prefilter, where the cutoff frequency is determined by the sampling rate, and one of different reconstruction schemes is then applied. The problem is to determine a prefilter so that the reconstruction will reproduce original object as accurately as possible. If the combination of prefiltering and reconstruction in the volumetric space is not adequate, aliasing artifacts will appear. Aliasing artifacts project from the threedimensional space onto the projection plane and superpose to the artifacts caused by sampling and reconstruction in two dimensions. In this paper we present a methodology for designing filters based on optimization of combined operation of prefiltering and reconstruction postfiltering. This methodology offers a framework for comparing different reconstruction schemes in equal circumstances. The correct choice of reconstruction will also influence the derivative reconstruction which is used for shading. We demonstrate our results on examples in two- and threedimensional space.

Izvorni jezik
Engleski

Znanstvena područja
Računarstvo

POVEZANOST RADA