Real time rendering and acquisition of spherical light fields [Elektronische Ressource] = Echtzeit-Rendering und Akquisition sphärischer Lichtfelder / von Severin Sönke Todt

Real-Time Rendering and Acquisitionof Spherical Light FieldsEchtzeit-Rendering und Akquisitionsph¨arischer LichtfelderVom Fachbereich Elektrotechnik und Informatik derUniversit¨ at Siegenzur Erlangung des akademischen GradesDoktor der Ingenieurwissenschaften(Dr.-Ing.)genehmigte DissertationvonDipl.-Inf. Severin Sonk¨ e TodtSiegen – Juni 20091. Gutachter: Prof. Dr. A. Kolb2. Prof. Dr. G. GreinerVorsitzender: Prof. Dr. V. BlanzTag der mundlichen¨ Pruf¨ ung: 16. Juni 2009Gedruckt auf alterungsbest¨ andigem holz- und s¨aurefreiem Papier.AbstractImage-based rendering techniques have proven to be a powerful alternative totraditional polygon-based computer graphics. This thesis presents a novel lightfield rendering technique which performs per-pixel depth correction of rays forhigh-quality light field reconstruction. The technique stores combined RGBand depth values in a parabolic 2D texture for every light field sample beingacquired at discrete positions in a uniform spherical setup. Image synthesisis implemented on the graphics processing unit within a customized fragmentprogram which extracts the correct image information from adjacent camerasfor each fragment by applying per-pixel depth correction of rays.This dissertation demonstrates that the presented image-based renderingtechnique provides a significant improvement compared to previous approaches.