標題: | Multi-resolution volume rendering of large time-varying data using video-based compression |
作者: | Ko, Chia-Lin Liao, Horng-Shyang Wang, Tsai-Pei Fu, Kuang-Wei Lin, Ching-Yao Chuang, Jung-Hong 資訊工程學系 Department of Computer Science |
關鍵字: | volume visualization;level-of-detail;time-varying volume rendering;volume compression;wavelet;motion-compensation |
公開日期: | 2008 |
摘要: | We present a new framework that combines the hierarchical multi-resolution representation with video-based compression to manage and render large scale time-varying data. In the preprocessing step, the proposed method first constructs a multi-resolution hierarchy using octree structure for each individual time step, and then applies a motion-compensation-based prediction to compress the octree nodes. During rendering stage, the data is decompressed on-the-fly and rendered using hardware texture mapping. The proposed approach eliminates the hierarchical decompression dependency commonly found in the conventional hierarchical wavelet representation methods, which leads to a more efficient reconstruction of data along the time axis. The system provides the user with a spatial region-of-interest (ROI) to adjust the spatial level-of-detail (LOD) selection, and a temporal ROI which is a sub-region only for frequent update during playback. With a suitable control of both ROIs, our system can reach an interactive playback frame rate. This allows the user to observe the dynamic nature of large time-varying data sets. |
URI: | http://hdl.handle.net/11536/730 |
ISBN: | 978-1-4244-1966-1 |
期刊: | IEEE PACIFIC VISUALISATION SYMPOSIUM 2008, PROCEEDINGS |
起始頁: | 135 |
結束頁: | 142 |
顯示於類別: | 會議論文 |