Handling Occluders in Transitions from Panoramic Images: A Perceptual Study
Handling Occluders in Transitions from Panoramic Images: A Perceptual Study
复制标题
DOI：
10.1145/1609967.1609972
复制
发表时间：
2009-09-01
影响因子：
1.6
通讯作者：
O'Sullivan, Carol
中科院分区：
文献类型：
--
作者：
Morvan, Yann;O'Sullivan, Carol
全景图像在以非常低的成本和极大的创作简便性传达视觉存在感方面非常有效。然而，与3D表示不同，它们在提供的导航选项方面受到限制。因此，期望提供从一个全景图到另一个全景图、或者从全景图到3D模型的令人满意的过渡。我们专注于观众向感兴趣区域移动的运动，以及处理他们路径上的遮挡物的问题。我们讨论现有的过渡方法，重点是它们需要的附加信息以及它们对创作过程的限制。我们提出了一种折衷的方法，基于遮挡来伪装视差效果。我们进行了一项用户研究，以确定额外的信息是否确实增加了过渡的视觉吸引力。我们观察到，只有当假视差效果可以与相机运动同步(但不一定与其一致)，并且遮挡边界上的视点差异很小时，才能单独创建遮挡遮罩仅在假视差效果可以与相机运动同步(但不一定与其一致)以及遮挡边界上的视点差异很小的情况下才有理由创建遮挡过渡越快，创建遮罩的感知价值就越小。有关视图对齐的信息总是有用的，因为溶解效果总是优先于褪色为黑色并返回。
Panoramic images are very effective at conveying a visual sense of presence at very low cost and great ease of authoring. They are, however, limited in the navigation options they offer, unlike 3D representations. It is therefore desirable to provide pleasing transitions from one panorama to another, or from a panorama to a 3D model. We focus on motions where the viewers move toward an area of interest, and on the problem of dealing with occluders in their path. We discuss existing transition approaches, with emphasis on the additional information they require and on the constraints they place on the authoring process. We propose a compromise approach based on faking the parallax effect with occluder mattes. We conduct a user study to determine whether additional information does in fact increase the visual appeal of transitions. We observe that the creation of occluder mattes alone is only justified if the fake parallax effect can be synchronized with the camera motion ( but not necessarily consistent with it), and if viewpoint discrepancies at occlusion boundaries are small. The faster the transition, the less perceptual value there is in creating mattes. Information on view alignment is always useful, as a dissolve effect is always preferred to fading to black and back.