ABSTRACT

In this paper, we present a novel ocean visualization framework, which focuses on analyzing multidimensional and spatiotemporal ocean data. GPU-based visualization methods are explored to effectively visualize ocean data. An improved ray casting algorithm for heterogeneous multisection ocean volume data is presented. A two-layer spherical shell is taken as the ocean data proxy geometry, which enables oceanographers to obtain a real geographic background based on global terrain. An efficient ray sampling technique including an adaptive sampling technique and a preintegrated transfer function is proposed to achieve high-effectiveness and high-efficiency rendering. Moreover, an interactive transfer function is also designed to analyze the 3D structure of ocean temperature and salinity anomaly phenomena. Based on the framework, an integrated visualization system called i4Ocean is created. The visualization of ocean temperature and salinity anomalies extracted interactively by the transfer function is demonstrated.

摘要

在本文中，我们提出了一个新颖的海洋可视化框架，该框架着重于分析多维和时空海洋数据。探索了基于GPU的可视化方法，以有效地可视化海洋数据。提出了一种针对异质多断面海量数据的改进的射线投射算法。以两层球形外壳作为海洋数据代理几何体，使海洋学家能够基于全球地形获取真实的地理背景。提出一种包括自适应采样技术和预集成传递函数的有效射线采样技术，以实现高效和高效渲染。此外，还设计了一个交互传递函数来分析海洋温度和盐度异常现象的3D结构。基于该框架，创建了一个名为i4Ocean的集成可视化系统。演示了通过传递函数以交互方式提取的海洋温度和盐度异常的可视化。