Incorporating vertical disparity into computational models of depth perception

我们的两只眼睛为我们提供了两个稍微不同的窗口。我们的大脑将这些联合收割机结合起来，给我们一个统一的世界观，同时利用它们之间的微妙差异，以3D的方式赋予我们丰富的世界观。了解这个过程将告诉我们更多关于感知的一般知识，以及建议我们将来如何能够帮助这个过程失败的人，例如斜视。我们的大脑已经开发出非常精确的控制眼球运动的电路，以确保两只眼睛总是看同一件事，并尽量减少图像之间的任何垂直偏移。当我们直视前方时，两只眼睛的图像仅在水平偏移上有所不同，反映了我们眼睛的水平位移。然而，当我们在视觉场景中移动眼睛时，小的垂直差异是不可避免的。我们的大脑是否预测了预期的垂直差异，给定眼睛的当前位置？或者它只是允许一定的范围，将垂直差异视为系统中的噪音？这个答案将帮助我们理解构成我们轻松感知的基础的复杂计算。

Our two eyes provide us with two slightly different windows on the world. Our brains combine these to give us a unified view of the world, while using the subtle differences between them to impart a rich perception of the world in 3D. Understanding this process will tell us more about perception in general, as well as suggesting how we might in future be able to help people in whom this process has failed, for example in squint. Our brains have developed very precise circuitry for controlling eye movements, in order to ensure that both eyes always look at the same thing and in order to minimise any vertical offsets between the images. When we look straight ahead, the two eye’s images differ only by horizontal offsets, reflecting the horizontal displacement of our eyes. However, when we move our eyes around a visual scene, small vertical disparities are inevitable. Does our brain predict the expected vertical disparities, given the current position of the eyes? Or does it simply allow for some range, treating vertical disparities as noise in the system? The answer will help us understand the sophisticated computations which underlie our effortless perception.