Volumetric 3D displays allow the user to explore a 3D scene free of joysticks, keyboards, goggles, or trackers. For nontrivial scenes, computing and transferring a 3D image to the display takes hundreds of seconds, which is a serious bottleneck for many applications. The OCRI is a compact scene representation that stores only and all scene samples that are visible from a viewing volume centered at a reference viewpoint. The OCRI enables computing and transferring the 3D image an order of magnitude faster than when the entire scene is processed. When compared with a depth image, an OCRI provides much improved scene coverage with no increase in rendering cost on the 3D display. |