Interactive visibility retargeting in VR using conformal visualization.
Interactive visibility retargeting in VR using conformal visualization.
复制标题
使用共形可视化在 VR 中实现交互式可见性重定向。
DOI：
10.1109/tvcg.2011.278
复制
发表时间：
2012
影响因子：
5.2
通讯作者：
Gu,XianfengDavid
中科院分区：
文献类型：
--
作者：
Petkov,Kaloian;Papadopoulos,Charilaos;Zhang,Min;Kaufman,ArieE;Gu,XianfengDavid
在虚拟现实中，像CAVE这样的沉浸式系统为协作探索大型3D数据提供了重要工具。与头戴式显示器不同，由于空间、访问或成本限制，这些系统通常仅具有部分沉浸感。由此导致的视觉信息的丢失成为需要利用用户整个视野的关键任务的主要障碍。我们已经开发了一种共形可视化技术，它建立了一个共形映射之间的完整的360度视野和一个给定的可视化系统的显示几何。该映射是可证明的角度保持的，并具有理想的属性，保持形状局部，这是重要的识别基于形状的功能，在视觉数据。我们将共形可视化应用于各种重定向场景中的向前和向后渲染管道，包括CAVE和平板显示器的角度布置。与基于图像的重定向方法相比，我们的技术构建了准确的立体图像，没有反射伪影。我们的用户研究表明，在沉浸式虚拟结肠镜检查中的视觉息肉检测任务中，与传统的渲染方法相比，适形可视化在可比的检查时间内提高了灵敏度。我们还开发了一种新的用户界面的基础上的交互式重建的保角映射和实时再生的视图方向对应。
In Virtual Reality, immersive systems such as the CAVE provide an important tool for the collaborative exploration of large 3D data. Unlike head-mounted displays, these systems are often only partially immersive due to space, access, or cost constraints. The resulting loss of visual information becomes a major obstacle for critical tasks that need to utilize the users' entire field of vision. We have developed a conformal visualization technique that establishes a conformal mapping between the full 360^\circ field of view and the display geometry of a given visualization system. The mapping is provably angle-preserving and has the desirable property of preserving shapes locally, which is important for identifying shape-based features in the visual data. We apply the conformal visualization to both forward and backward rendering pipelines in a variety of retargeting scenarios, including CAVEs and angled arrangements of flat panel displays. In contrast to image-based retargeting approaches, our technique constructs accurate stereoscopic images that are free of resampling artifacts. Our user study shows that on the visual polyp detection task in Immersive Virtual Colonoscopy, conformal visualization leads to improved sensitivity at comparable examination times against the traditional rendering approach. We also develop a novel user interface based on the interactive recreation of the conformal mapping and the real-time regeneration of the view direction correspondence.