Sample-Based Cameras for Feed Forward Reflection Rendering

• Published in: IEEE transactions on visualization and computer graphics 2006-11, Vol.12 (6), p.1590-1600
• Main Authors: Popescu, V., Sacks, E., Mei, C.
• Format: Article
• Language: English
• Subjects: Algorithms; Cameras; Computer Graphics; Feeds; Geometry; Graphics; Hardware; Illumination; Image Enhancement - methods; Image Interpretation, Computer-Assisted - methods; image-based rendering; Imaging, Three-Dimensional - methods; Information Storage and Retrieval - methods; interactive rendering; Layout; Lighting; Optical reflection; Photography - instrumentation; Photography - methods; Photometry - instrumentation; Photometry - methods; Pipelines; Projection; Reflection; Reflections; Reflectors; Rendering; Rendering (computer graphics); Reproducibility of Results; sample-based graphics; Sensitivity and Specificity; Surface properties; Tree graphs
• ISSN: 1077-2626; 1941-0506
• DOI: 10.1109/TVCG.2006.103

This paper presents sample-based cameras for rendering high quality reflections on convex reflectors at interactive rates. The method supports change of view, moving objects and reflectors, higher order reflections, view-dependent lighting of reflected objects, and reflector surface properties. In order to render reflections with the feed forward graphics pipeline, one has to project reflected vertices. A sample-based camera is a collection of BSP trees of pinhole cameras that jointly approximate the projection function. It is constructed from the reflected rays defined by the desired view and the scene reflectors. A scene point is projected by invoking only the cameras that contain it in their frustums. Reflections are rendered by projecting the scene geometry and then rasterizing in hardware