使用 iOS 深度相机测量两点之间的实际距离
现在我正在探索 iOS 深度相机 的功能，现在我想获取两点之间（例如，两只眼睛之间）的真实世界度量距离。
我已成功连接 iOS 深度相机 功能，并且手中有 AVDepthData，但我不太确定如何获得两个特定点之间的真实距离。
我相信如果我有深度和视角，我可以计算它，但我没有看到后者作为参数呈现。我也知道这个任务可以用 ARKit 来处理，但我真的很好奇我自己如何实现它。我的意思是 ARKit 也使用深度相机，因此必须有一种算法，其中深度图就是我计算真实距离所需的全部，
您能给我一个如何解决此任务的建议吗？提前致谢！
Right now I'm exploring features of iOS Depth camera and now I want to obtain the distance in real-world metrics between two points (for example, between two eyes).
I have successfully connected iOS Depth camera functionality and I have AVDepthData in my hands but I'm not quite sure how I can get a real-world distance between two specific points.
I believe I could calculate it if I have depth and viewing angle, but I don't see that the latter is presented as parameter. Also I know that this task could be handled with ARKit, but I'm really curious how I can implement it myself. I mean ARKit uses Depth camera as well, so there must be an algorithm where Depth maps is all I need to calculate the real distance
Could you please give me an advice how to tackle this task? Thanks in advance!
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