Importing a Photogrammetry refxml

[[Du...]]

I have an ATOS Template setup, recently we had our frame have photogrammetry. Is there somewhere i can read over the steps to import that ref frame points and align it to the current location of the scan?

[[Ma...]]

Hi,

i was able to do that like this.

1. have a CAD model of that frame ( to be able to do alignment )
2. scan that frame with ref. points on that frame
3. do an alignment in which you will export data
4. export all ref. points ( it's a xml so you can easily remove unwanted ref. points )
5. now you can import that fram in setings.

All you have to do is correctly set temperature and material in export and import.

[[Du...]]

We have a REFXML but when we import it to our system, it is no where near our 0,0 on the 300mm plate. is there a way to align that REFXML to the frame CAD model in the ATOS project?

 

[[Na...]]

Hi Dustin,

I think easiest way would be this function:

https://techguide.zeiss.com/en/zeiss-inspect-2026/article/cmd_manage_alignment_replace_initial_alignment_with_best_fit_by_reference_points.html

this might also help: 

ZEISS Quality Tech Guidehttps://techguide.zeiss.com/en/zeiss-inspect-2026/article/cmd_cad_transform_reference_points_to_fixture.html

 

The reference points are transformed together with the mesh, so depending on the alignment they might be not on the fixture when the part mesh is aligned to the CAD.

Nanno

 

[[Du...]]

Seems the 2017 version i am running does not have that edit initial alignment option. I was able to delete all the previous alignments and access the LBF by reference points. I got some questions
1.  How does GOM understand how to use the imported refXML for polygonization? My understanding of photogrammetry is that this will increase accuracy of transformations

2. The REFXML doesnt come into effect until the scan gets done and it then aligns the imported point cloud to the newly scanned fixture, how does this improve scan parameters? once the ref points are aligned, do the imported nominals readjust the newly scanned ref points?

3. only way to confirm that photogrammetry is working is to do a type 2 or type 1? 

 

Just trying to wrap my head around the whole process. 

 

Thank you

[[Ma...]]

Well i am using that for removal of fixture from mesh.

In program i am importing cad model and assigning it as a fixture. Then i am selecting used fixture in Aquisition menu.

Now fixture model is exactly where ref points is telling ( according to refxml definition )

I believe after scan and background removal you normally polygonize. Then you go to selection by mesh - select fixture and define far away from model you will select on mesh. Now press Ctrl+Delete to remove selected mesh.