Warren Paul A, Rushton Simon K
School of Psychology, Cardiff University, P.O. Box 901, Cardiff CF10 3YG, Wales, UK.
Vision Res. 2008 Feb;48(5):655-63. doi: 10.1016/j.visres.2007.10.023.
Retinal motion of objects is not in itself enough to signal whether or how objects are moving in the world; the same pattern of retinal motion can result from movement of the object, the observer or both. Estimation of scene-relative movement of an object is vital for successful completion of many simple everyday tasks. Recent research has provided evidence for a neural flow-parsing mechanism which uses the brain's sensitivity to optic flow to separate retinal motion signals into those components due to observer movement and those due to the movement of objects in the scene. In this study we provide further evidence that flow-parsing is implicated in the assessment of object trajectory during observer movement. Furthermore, it is shown that flow-parsing involves a global analysis of retinal motion, as might be expected if optic flow processing underpinned this mechanism.
物体的视网膜运动本身并不足以表明物体在现实世界中是否正在移动或如何移动；相同的视网膜运动模式可能是由物体、观察者或两者的运动所导致的。估计物体相对于场景的运动对于成功完成许多简单的日常任务至关重要。最近的研究为一种神经流解析机制提供了证据，该机制利用大脑对光流的敏感性，将视网膜运动信号分离为由于观察者运动产生的成分和由于场景中物体运动产生的成分。在本研究中，我们提供了进一步的证据，表明流解析与观察者运动期间物体轨迹的评估有关。此外，研究表明流解析涉及对视网膜运动的全局分析，这正如光流处理支撑该机制时所预期的那样。
