If I have an image like the following and I know the area of the central hole ( ie c*d, say 35 m^2), how would I calculate the lengths a and b? Ideally using software rather than back-of-the-envelope maths, but the maths would be fine too.
2026-03-26 04:51:24.1774500684
Calculating 3D distances in a 2D image (Ideally with software)
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