The role of stereopsis in the perception of objects

在我们的环境中，有许多关于物体之间和跨表面的距离的信息来源，但只有立体视觉(3D电影的基础)才能提供令人信服的点之间空间体积的感觉。这一深度线索已经被广泛研究，使用非常简单的刺激，使我们能够分离出它对人类视觉的贡献。这类实验表明，从立体视觉获得的深度感知是极其精确的，从仅移动一根头发宽度的刺激中获得可靠的深度感知。然而，我们周围的世界是由物体和表面组成的，重要的是我们要了解当简单的刺激(线、边)组合在一起形成物体时，立体视觉是如何使用的。因此，我的研究计划的下一个重要阶段是弥合孤立线条实验之间的差距，到更自然的基于物体的刺激，以更好地了解立体视觉在现实世界中如何以及何时使用。 我的研究计划的重点是了解立体深度知觉的基本特性如何受到其他此类线索的存在的影响，无论是在自然场景的3D图像中，还是在现实世界中的物体排列中。虽然这项研究的重点是大脑如何实现3D深度感知，但其结果将与安大略省不断增长的3D媒体行业非常相关，因为他们致力于创建舒适而有效的3D显示和内容。

There are many sources of information regarding the distances between objects and across surfaces in our environment, but only stereopsis (the basis of 3D movies) can provide the compelling sense of the volume of space between points. This depth cue has been studied extensively, using very simple stimuli that allow us to isolate its contribution to human vision. Such experiments have shown that the percepts of depth from stereopsis are extremely precise, with reliable depth percepts obtained from stimuli that are displaced by only a hair's width. However, the world around us consists of objects and surfaces, and it is important that we understand how stereopsis is used when simple stimuli (lines, edges) are grouped to form objects. Therefore, the important next phase of my research program is to bridge the gap between experiments with isolated lines, to more naturalistic object-based stimuli to better understand how and when stereopsis is used in the real world. The focus of my research program is to understand how fundamental properties of stereoscopic depth perception are influenced by the presence of other such cues, in 3D images of natural scenes, or in real-world arrangements of objects. While this research focusses on how the brain achieves 3D depth perception, the results will be very relevant to the growing 3D media industry in Ontario as they work towards creating comfortable and effective 3D displays and content.