How to obtain accurate dimensions from perspective distortions

any pointers on how to transform a perspective image in order to determine more accurate dimensions of the actual object?

foldedForm1.3dm (221.2 KB)

you will need at least a second picture, from a different point of view.

There are many nice works that play with this aspects of perspective:

Matthieu Robert Ortis Sculpture Anamorphous Illusion 5

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It seems to be the only photo in existence. =:-(