We propose an extension of the well-known Space-Time Cube (STC) visualization technique in order to visualize time-varying 3D spatial data, taking advantage of the interaction capabilities of Virtual Reality (VR). The analysis of multidimensional time-varying datasets, which size grows as recording and simulating techniques advance, faces challenges on the representation and visualization of dense data, as well as on the study of temporal variations. First, we propose the Space-Time Hypercube (STH) as an abstraction for 3D temporal data, extended from the STC concept. Second, through the example of embryo development imaging dataset, we detail the construction and visualization of a STC based on a user-driven projection of the spatial and temporal information. This projection yields a 3D STC visualization, which can also encode additional numerical and categorical data. Additionally, we propose a set of tools allowing the user to filter and manipulate the 3D STC which benefits from the visualization, exploration and interaction possibilities offered by VR. Finally, we evaluated the proposed visualization method in the context of the visualization of spatio-temporal biological data. Several biology experts accompanied the application design to provide insight on how the STC visualization could be used to explore such data. We report a user study (n=12) using non-expert users performing a set of exploration and query tasks to evaluate the system.
翻译:我们提议扩大众所周知的时空立方体(STC)可视化技术,以便利用虚拟现实(VR)的互动能力,将时间变化的3D空间数据进行视觉化。 分析多维时间变化数据集,随着记录和模拟技术的进步,其大小随着记录和模拟技术的进步而增加,在密集数据的表述和可视化以及时间变化研究方面面临着挑战。首先,我们提议将空间时超立方体(STH)作为3D时间数据的一种抽象数据,从STC概念扩展为3D时间数据。第二,通过胚胎开发成像数据集的例子,我们详细介绍了基于用户驱动的对空间和时间信息预测的STC构建和可视化。这一预测产生了3DSTC可视化数据,它也可以将更多的数字和绝对数据编码起来。此外,我们提出一套工具,使用户能够过滤和操纵3DSTC,这从VR提供的可视化、探索和互动可能性中获益。最后,我们评价了在可视化空间成像成像数据集中拟议的可视化方法,同时利用Spetio-derial Excialdal distreal distration distration digradududududududududustre us a ex ex ex drodududududududuction a view view view views view view view view view view view viewd viewpald viewd view viewd viewdal viewdal viewd viewdaldald viewd viewdal viewdaldentaldaldald viewdaldaldald diviewd diviewd vidud digrad digraducald d d d d d daldaldald diportd diportdald diportd diportd diportd diportd diction dictiond ex d d daldal daldaldaldaldaldaldald vicaldaldaldaldald di