Transforming 2D image coordinates to 3D world coordinates

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Dekel Mashiach
Dekel Mashiach 2022-5-10
编辑： Matt J 2022-5-11
Hey, I'm trying to convrte from 2d image to 3d real world coordinates. The image I attached has the opposite ratio, from 3D to 2D does anyone know how to make the relationship I am looking for?

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回答（2 个）

Matt J
Matt J 2022-5-10
编辑：Matt J 2022-5-10
The inversion is not unique, but if you don't care which of the infinite choices there are for the 3D point, one possibility is,
X3d=pinv(P)*[x;y;1];
X3d=X3d(1:3)/X3d(4)
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Dekel Mashiach
Dekel Mashiach 2022-5-10
I have pixel in an image and I want to convrte it to 3D worlsd coordinates
Matt J
Matt J 2022-5-11
编辑：Matt J 2022-5-11
Yes, that was clear, and that is what I have given you.
However, it is a many-to-one inverse problem. There are many 3D points that correspond to the same image pixel, and my solution represents one of an infinite number of choices.

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Matt J
Matt J 2022-5-11
编辑：Matt J 2022-5-11
If you have pixel coordinates of a 3D point imaged by two cameras, you can use the triangulate command to triangulate the 3D locations,

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