Geometry and Attribute Compression for Voxel Scenes

Voxel-based approaches are today’s standard to encode volume data. Recently, directed acyclic graphs (DAGs) were successfully used for compression, but they are restricted to a single bit of (geometry) information per voxel. We present several methods to compress arbitrary data (e.g., colors, normals, or reflectance information). Our most successful method decouples geometry and voxel data via a novel mapping scheme, enabling us to apply the DAG principle on the geometry while compressing the voxel attributes using a specialized algorithm. This leads to a drastic memory reduction. Our method outperforms existing state-of-the-art techniques and is well-suited for GPU architectures, resulting in real-time performance on commodity hardware for colored scenes with up to 17 levels (131,072^3 resolution) treated in core.Computer GraphicsIntelligent SystemsElectrical Engineering, Mathematics and Computer Scienc