TY - BOOK AU - Szirmay-Kalos, László TI - Monte-Carlo Methods in Global Illumination: Photo-realistic Rendering with Randomization PB - VDM Verlag Dr. Müller CY - Saarbrücken PY - 2008 SP - 128 SN - 3836479192 UR - https://m2.mtmt.hu/api/publication/2612455 ID - 2612455 LA - English DB - MTMT ER - TY - JOUR AU - Szirmay-Kalos, László AU - Antal, Gy AU - Sbert, M TI - Go with the Winners Strategy in Path Tracing JF - JOURNAL OF WINTER SCHOOL OF COMPUTER GRAPHICS J2 - J WSCG VL - 13 PY - 2005 SP - 49 EP - 56 PG - 8 SN - 1213-6972 UR - https://m2.mtmt.hu/api/publication/2612459 ID - 2612459 LA - English DB - MTMT ER - TY - CHAP AU - Benedek, Balázs AU - Szirmay-Kalos, László AU - Antal, György ED - Kenneth, Joy ED - Szirmay-Kalos, László TI - Weighted importance sampling in shooting algorithms T2 - Spring Conference on Computer Graphics, SCCG 2003 - Conference Proceedings PB - ACM Press CY - New York, New York SN - 9781581138610 PY - 2003 SP - 177 EP - 184 PG - 8 DO - 10.1145/984952.984981 UR - https://m2.mtmt.hu/api/publication/2612485 ID - 2612485 AB - This paper proposes the application of a variance reduction technique called weighted importance sampling in shooting type global illumination algorithms. The sampling applied by shooting type Monte-Carlo global illumination algorithms can mimic the power of the transfer, but not the BRDFs at the visible target. Consequently, these algorithms are poor in rendering visible specular surfaces. In order to eliminate these drawbacks, the BRDFs at the visible targets are taken into account as an additional weighting of the sampling density. After discussing the basic concepts we demonstrate the proposed idea with two algorithms. The first one uses conventional rays, while the second one ray-bundles to transfer the light in the scene. LA - English DB - MTMT ER -