2026-04-04T02:25:59Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/71382024-06-14T10:06:31Zcom_2072_452955com_2072_2054col_2072_453069col_2072_453081

2024-06-14T10:06:31Z urn:hdl:10256/7138 Fast Inverse Reflector Design (FIRD) Mas Baixeras, Albert Martín Campos, Ignacio Patow, Gustavo Llums -- Disseny assistit per ordinador Lamps -- Computer-aided design Optimització matemàtica Mathematical optimization This paper presents a new inverse reflector design method using a GPU-based computation of outgoing light distribution from reflectors. We propose a fast method to obtain the outgoing light distribution of a parametrized reflector, and then compare it with the desired illumination. The new method works completely in the GPU. We trace millions of rays using a hierarchical height-field representation of the reflector. Multiple reflections are taken into account. The parameters that define the reflector shape are optimized in an iterative procedure in order for the resulting light distribution to be as close as possible to the desired, user-provided one. We show that our method can calculate reflector lighting at least one order of magnitude faster than previous methods, even with millions of rays, complex geometries and light sources This work was done under grant TIN2007-67120 from the Spanish Government, and under grant 7th Framework Programme-Capacities (grant No 222550, project EcoStreetLight) from the UE 2024-06-14T10:06:31Z 2024-06-14T10:06:31Z 2009 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion http://hdl.handle.net/10256/7138 info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1467-8659.2009.01430.x info:eu-repo/semantics/altIdentifier/eissn/1467-8659 info:eu-repo/grantAgreement/MEC//TIN2007-67120/ES/CAD BASADO EN EL MODELADO Y LA SIMULACION DEL TRANSPORTE DE LUZ/ info:eu-repo/grantAgreement/EC/FP7/222550/EU/Development of 25% more energy efficient street lights with integrated reflector, elimination of protection glass, optimized arc tube and improved luminaire design./ECOSTREETLIGHT Tots els drets reservats info:eu-repo/semantics/openAccess Wiley © Computer Graphics Forum, 2009, vol. 28, núm. 8, p.2046–2056 Articles publicats (IIIA)