Tracking the movement of markers?

[jaustin]

We want to track the movement of markers with our Optitrack system. They are arranged on the surface of a large flat panel that will bulge in under pressure or out under vacuum.

Everything I see about tracking is on tracking rigid bodies. I assume we have a point cloud; can we track the movement of these points?
Jim

[NaturalPoint - Mike]

You can, however you may need to solve their identities. How do you plan on getting the information out of Tracking Tools? Are you going to want real time information or is recording then exporting acceptable?

[jaustin]

If possible we'll start with exporting as it's easiest and we don't need the data during the experiment.

Your question seem to infer that the process of �solving the identity� of the points relates to how we get the data out.
Jim

[NaturalPoint - Mike]

Well, in a way. Exporting via CSV will give you marker IDs in the tables. You'll just need to parse them to get the x/y/z of individual point cloud markers and their corresponding IDs, then find a way to solve for missing markers/ID changes (which occur when markers are occluded and come back into view)

[jaustin]

I used two (unrelated) points to form a tractable object and exported; I see that the info we need is in the file.

So we�re back to my original question: can we export to the .csv file without having to create a bogus tractable?
Jim

[NaturalPoint - Mike]

Sure. Without a trackable, the only line in the CSV will be frame, which contains individual point cloud marker information.