TY - GEN N1 - Optica Applicata, Vol. 38, 2008, nr 3, s. 519-530 N2 - In this paper, a fast graphics process unit (GPU) based ray casting algorithm is presented to improve image quality. A linear interpolation is used to estimate the intersection between a ray and isosurfaces. Thus, resampling artefacts is greatly reduced and the performance is not influenced. An iterative estimation is presented to further improve image quality. According to the distance the ray goes across, z values in the z-buffer are modified to implement hiding of hybrid scenes. Experimental results show that the algorithm can produce high quality images at interactive frame rates and implement hiding of hybrid scenes very well. L1 - http://www.dbc.wroc.pl/Content/62919/optappl_3803p519.pdf M3 - artykuł L2 - http://www.dbc.wroc.pl/Content/62919 PY - 2008 KW - optyka KW - virtual endoscopy KW - linear interpolation KW - medical image processing KW - graphics process unit (GPU) KW - ray casting KW - isosurface C1 - Wszystkie prawa zastrzeżone (Copyright) A1 - Yuan, Feiniu A2 - Gaj, Miron. Redakcja A2 - Urbańczyk, Wacław. Redakcja PB - Oficyna Wydawnicza Politechniki Wrocławskiej C6 - Dla wszystkich w zakresie dozwolonego użytku LA - eng CY - Wrocław T1 - An iterative programmable graphics process unit based on ray casting approach for virtual endoscopy system UR - http://www.dbc.wroc.pl/dlibra/publication/edition/62919 ER -