Orthophoto from a cylinderical shape

[Ingsayyad]

Hi,
I need to detect and draw small details (1-2 mm) from my images. I can see these small details on my images.

Generally I would make very high resolution orthophotos and draw/digitize on orthophotos-

 But for cylinderical objects what should I do.

If I generate my point cloud and unrape it into CloudCompare, I would definitely not able to digitise in mm. This is due to project size (very large---length of cylinder 40m, radius 2 m).

Any suggestion about workflow.

Note: I'm aware of this post.
unwrapping a cylindrical 3d model