Octant Priority for Radiosity Image Rendering
نویسندگان
چکیده
This paper presents a new scheme for image display using radiosity methods. An octree technique performs subdivision of polygons which is required in any radiosity method. The octree-based subdivision not only subdivides polygons into patches, but also produces a sequence of leaf octants implicitly sorted in the octree. By traversing the octree, a depth priority of these leaf octant,s with respect to a given viewer position can be found efficiently. Since each octant contains a certain number of patches, octant priority implies a patch depth priority that is used to determine visibility in computing form-factors by a front-to-back list priority algorithm. This list-priority method has many advantages over the z-buffer and can avoid some unnecessary computation.
منابع مشابه
Image and Intervisibility Coherence in Rendering
Researchers in computer graphics have long regarded the exploitation of image coherence as one of the fundamental opportunities for improving the efficiency of image rendering. We describe in this paper a theoretical and experimental investigation of the potential benefits of exploiting this phenomenon through the use of hybrid rendering strategies that combine area-sampling and pointsampling t...
متن کاملComputational requirements for accelerating radiosity algorithms
A major problem in realistic image synthesis is the solution of the rendering equation. The goal of research in this area is aimed at arriving at faster solutions which satisfy the desired numerical and visual accuracy. Radiosity methods provide an effective solution to the rendering equation for lambertian diiuse environments. In this paper we present a brief survey of the various radiosity al...
متن کاملEfficient object-based hierarchical radiosity methods
The efficient generation of photorealistic images is one of the main subjects in the field of computer graphics. In contrast to simple image generation which is directly supported by standard 3D graphics hardware, photorealistic image synthesis strongly adheres to the physics describing the flow of light in a given environment. By simulating the energy flow in a 3D scene global effects like sha...
متن کاملAn Image-Based Radiosity Representation
We present a geometry-independent radiosity representation which stems from image-based methodologies. Our image-based representation is inspired by the concept of layered depth images. To construct the radiosity function we render shaded depth images and warp them into the representation. This enables us to alter Keller’s instant radiosity algorithm to a view-independent variant, allowing inte...
متن کامل