Mesh Volume in Real Units (mm3)

[santiago2389]

I have saved a mesh of Box (24cm x 21cm x 10 cm) using Meshroom tool.
I load the mesh using Open3d and make it watertight using pyvista and pymeshfix.
Finally, I calculated the volume using pemeshfix mesh attribute volume.
But the volume is ~0.12. In real it should be 0.005 meter cube.
I have used downscale factor = 4 in depth map generation step.

Does the meshroom/alicevision provide mesh in real units? Is there any conversion factor/method for this?

[natowi]

Does the meshroom/alicevision provide mesh in real units?

-no, you need to calculate the scaling factor based on a known distance
or
-use https://github.com/alicevision/Meshroom/wiki/CCTAG-scaling (markers have to be in the original images)

Also note: the downscale factor is not related to the object size it is related to the compression. You have to use SFMTransform -> Additional scale -> see https://github.com/alicevision/Meshroom/wiki/Model-orientation