To understand how these work, let’s first look at a simpler type of autostereogram.

要了解这些是如何工作的， 让我们首先看一种更简单的自动立体图。

The first random-dot autostereograms were made by hand in the 1970s.

第一个随机点自动立体图是在 1970 年代手工制作的。

This diagram shows the view from above your head and these dots represent icons on a simple autostereogram like the one i just showed you.

这张图显示了你头顶的视图， 这些点代表了一个简单的自动立体图上的图标，就像我刚刚给你看的那样。